Clinical Deep Dives
Clinical Deep Dives is a podcast for clinicians and learners who want understanding, not just information. Using classic medical and surgical texts as a guide and the generative power of AI, each episode explores ideas with curiosity and clarity. Designed for learning on the move and knowledge that actually sticks.
Episodes
PSYCH 100: Multimodal Neuroimaging and the Future of Schizophrenia Research
Medlock Holmes stands before the final chamber of the Neuroimaging Institute.Around him are the tools he has mastered throughout his investigation.MRI reveals the brain’s architecture.Diffusion imaging maps its white matter highways.PET uncovers its chemistry.Magnetic resonance spectroscopy measures its metabolites.Functional MRI watches neural networks come alive.Each technique has solved part of
PSYCH 099: Functional Brain Imaging in Schizophrenia
Medlock Holmes enters the Hall of Living Minds.Unlike the museum of structural imaging, nothing here is still. Every wall pulses with colour as thoughts ignite across the cortex. Memory glows, emotion flickers, attention surges, and language races through intricate neural pathways. Holmes is no longer examining anatomy-he is watching the brain at work.His first instrument is functional magnetic re
PSYCH 098: Structural Brain Imaging in Schizophrenia
Medlock Holmes enters a vast radiological observatory where the human brain can be examined without ever being opened.The earliest instruments are crude. Old computed tomography images reveal enlarged ventricles-dark chambers within the brain that seem wider in people with schizophrenia. The finding is important, but it is not specific enough to solve the case.Then the observatory changes.Magnetic
PSYCH 097: Cellular and Molecular Neuropathology of Schizophrenia
Medlock Holmes enters a laboratory containing a brain that appears, at first glance, entirely normal.There is no tumour.No haemorrhage.No obvious area of destruction.Nothing resembling the unmistakable lesions seen in many neurological diseases.Yet Holmes knows that normal appearance does not mean normal function.He begins his investigation at the microscopic level.Within the prefrontal cortex, th
PSYCH 096: The Clinical Epidemiology of Psychosis Spectrum Disorder
Medlock Holmes enters a vast railway control room where thousands of human journeys are represented by illuminated tracks.Some routes remain smooth throughout life.Others begin with subtle diversions: delayed development, social isolation, anxiety, depression, trauma, or unusual perceptual experiences. Most of these tracks eventually return to the main line. A smaller number continue towards persi
PSYCH 095: Genetics of Schizophrenia
Medlock Holmes enters perhaps the most intricate room in the entire Psychiatric Archive.Above the doorway is engraved:“The Library of Inheritance.”Thousands of leather-bound books stretch from floor to ceiling.Each volume represents a human genome.Holmes expects to find a single book labelled The Schizophrenia Gene.Instead, he finds nothing of the sort.The librarian smiles.“You are looking for one
PSYCH 094: Global Burden of Schizophrenia
Medlock Holmes arrives at the Hall of Human Burden.Unlike previous investigations, this hall contains no microscopes, MRI scanners, or genetic maps.Instead, the walls are covered with clocks.Some clocks have stopped too early.Others continue to tick, but their hands barely move, representing lives lived with profound disability rather than early death.Holmes quickly realises that measuring illness
PSYCH 093: Phenomenology of Schizophrenia
Medlock Holmes enters an enormous archive filled with thousands of witness statements.Some describe voices no one else can hear.Others speak of thoughts being inserted, removed, or broadcast beyond the boundaries of the mind.Some accounts are crowded with elaborate conspiracies. Others contain only a few sparse words, long silences, diminished expression, and a life gradually emptied of purpose.Ev
PSYCH 092: Schizophrenia
Schizophrenia is one of the most misunderstood disorders in medicine. It is not simply a condition of hallucinations and delusions; it is a disorder that disrupts perception, cognition, motivation, emotion, and the ability to connect with the world. For centuries it was viewed as madness, then as degeneration, later as a dopamine disorder, and now increasingly as a disorder of brain circuits, neur
PSYCH 091: Anabolic-Androgenic Steroid-Related Disorders
A famous bodybuilder walks into Medlock Holmes’ consulting room.He is physically magnificent.Broad shoulders. Sculpted chest. Powerful arms.Yet Holmes notices something else.The man cannot stop looking at his reflection.Every polished surface becomes another mirror.Every missed gym session feels catastrophic.Every slight reduction in muscle size feels like losing part of himself.Holmes quickly rea
PSYCH 090: Sedative-, Hypnotic-, or Anxiolytic-Related Disorders
Medlock Holmes is summoned to investigate a peculiar paradox.The patients arriving at his clinic are not chasing euphoria. Many have never bought drugs illegally. They are teachers, nurses, executives, retirees, and people living with chronic anxiety or insomnia. They followed medical advice. They took their medication exactly as prescribed.Yet months-or years-later, many discover something unsett
PSYCH 089: Opioid Use and Related Disorders: From Neuroscience to Treatment
Medlock Holmes enters a city built around a remarkable hospital.Within its walls, suffering is eased. Pain is softened. Patients who could not move begin to breathe, walk, sleep, and recover. The medicines used here are powerful, ancient, and deeply valuable.Yet beyond the hospital gates, Holmes finds another city forming in the shadows.At first, the same medicines offer warmth, relief, and escape
PSYCH 088: Tobacco-Related Disorders
Medlock Holmes is summoned to investigate the greatest unsolved epidemic in modern psychiatry.Unlike the previous cases, there is no mystery about what causes the deaths.The evidence has been overwhelming for decades.Yet millions continue to use the substance.The mystery is not what tobacco does.The mystery is why humanity continues to smoke despite knowing the truth.Holmes begins where every psyc
PSYCH 087: Inhalant-Related Disorders
Medlock Holmes is called to investigate a troubling mystery among the youngest citizens of the city.There is no dealer on the street corner.No hidden laboratory.No expensive supply chain.Instead, the clues are ordinary household objects: glue, paint thinner, spray cans, lighter fluid, petrol, correction fluid, cleaning products, and aerosol dusters.At first, the city dismisses the danger.These are
PSYCH 086: Hallucinogen-Related Disorders
Medlock Holmes is called to investigate a series of extraordinary reports.One witness describes colours that seem alive. Another believes time has stopped. A third feels completely detached from their own body, while another speaks of overwhelming love, profound spiritual insight, or terrifying paranoia. Some recover within hours, while others continue to experience disturbing visual phenomena mon
PSYCH 085: Cannabis-Related Disorders
Cannabis is often viewed as harmless, natural, or even medicinal, yet its relationship with mental health is far more complex. In this episode, Medlock Holmes investigates how THC alters brain function, why some people develop dependence while others do not, and the growing evidence linking cannabis with anxiety, psychosis, cognitive impairment, and withdrawal. As cannabis becomes increasingly pot
PSYCH 084: Caffeine-Related Disorders
Every morning, before the city truly awakens, Medlock Holmes notices a remarkable ritual.Office lights flicker on.Coffee machines begin to hiss.Kettles whistle.Students cradle steaming mugs.Doctors begin ward rounds with takeaway cups in hand.Parents finally feel awake after the first sip.Unlike the illicit drugs Holmes has investigated before, no one hides this substance.It is celebrated.Shared.O
PSYCH 082: Alcohol-Related Disorders
Medlock Holmes is invited to investigate a city where one establishment appears to be at the centre of almost every celebration.People gather there after work.Families celebrate milestones there.Business deals are made there.Victories are toasted there.At first glance, the tavern seems woven naturally into the life of the city.Yet Holmes begins noticing a different pattern.The same people keep ret
PSYCH 081: Substance Use Disorders: Introduction
Imagine Medlock Holmes arriving in a magnificent city renowned for one remarkable feature.Every citizen possesses complete freedom.Every street offers choices.Every marketplace presents opportunities.Every day, thousands of decisions are made.Which road to follow.Which people to trust.Which risks to take.Which pleasures to pursue.At the centre of the city stands the Hall of Choice.Inside, an intri
PSYCH 080: Cognitive Disorders Due to Another Medical Condition or Substance
Imagine Medlock Holmes arriving at a grand command centre responsible for coordinating an entire city.The command centre appears sophisticated and highly organised. It manages communication, planning, navigation, memory, and decision-making for every district.One day, however, the operators begin making mistakes.Messages are delayed.Instructions become confused.Important information is misplaced.D
PSYCH 079: Mild Cognitive Impairment and Amnestic Disorders
Imagine Medlock Holmes returning once more to the great library of the mind.Unlike the previous chapter, the library is still functioning remarkably well.The catalogue remains largely intact.Visitors can still find most of the books they need.The librarians continue their work.The building remains operational.Yet Holmes notices subtle signs that something has changed.A librarian takes longer to lo
PSYCH 083: Stimulant-Related Disorders
Medlock Holmes is summoned to investigate a city that never seems to sleep.The streets remain alive long after midnight.Factories work around the clock.Students study without rest.Traders chase impossible fortunes.Artists paint through the night.Everyone appears driven by an invisible force that promises endless energy, relentless focus, and extraordinary productivity.Yet Holmes quickly notices an
PSYCH 078: Major Neurocognitive Disorders
Imagine Medlock Holmes returning to the great library introduced in the previous chapter.At first glance, the library still stands.Its walls remain intact.The shelves are still filled with books.The familiar corridors continue to stretch into the distance.Yet something profound has changed.The librarians who once maintained the archives can no longer keep pace with the demands of the system.Catalo
PSYCH 077: Delirium
Imagine Medlock Holmes arriving in a bustling city that normally functions with remarkable precision.Traffic flows smoothly.Messages are delivered accurately.Citizens recognise one another.Markets open on time.The entire system depends upon a continuous and reliable supply of energy.One morning, however, something changes.The city’s power grid begins to fluctuate.Lights flicker unpredictably.Commu
PSYCH 076: Cognitive Disorders: Introduction
Imagine Medlock Holmes entering the largest library he has ever encountered.Endless shelves stretch beyond the horizon. Countless volumes contain memories, skills, language, relationships, emotions, and the accumulated experiences of an entire lifetime.At first glance, the library appears orderly and functional.Yet Holmes soon notices subtle signs that something is changing.A book returned to the
PSYCH 075: The Classification of Mental Disorders in the International Classification of Diseases
Imagine Medlock Holmes arriving at an immense international railway terminal.Thousands of travellers move through the station every hour. They come from different nations, cultures, languages, and healthcare systems. Yet somehow they all manage to navigate using a single set of signs, symbols, and destinations.Holmes quickly realises that this station represents the global healthcare system.The si
PSYCH 074: Present and Future of Classification Systems for Mental Disorders
Imagine Medlock Holmes standing within a vast cartography chamber.Spread before him are enormous maps of the mind created across different eras. Some are centuries old, hand-drawn and incomplete. Others are modern, precise, and densely detailed. Each attempts to answer the same question:How should we classify mental disorders?As Holmes examines the maps, he notices that none perfectly match the te
PSYCH 073: Clinical Manifestations of Psychiatric Disorders
Imagine Medlock Holmes entering a vast hall of mirrors.Each mirror reflects a different aspect of human experience: mood, thought, perception, memory, behaviour, identity, motivation, and consciousness. Most reflections remain coherent and integrated. Yet in some mirrors, subtle distortions begin to appear. A thought becomes fixed. An emotion becomes overwhelming. A perception no longer matches re
PSYCH 071: Cultural Competency in the Organisation and Delivery of Psychiatric Care
This chapter explores cultural competency as a foundational component of modern psychiatric practice. Mental health care does not occur in a cultural vacuum. Every patient, clinician, organisation, and healthcare system operates within networks of beliefs, values, traditions, identities, languages, and social experiences that influence how distress is understood and treated.Cultural competency ext
PSYCH 070: Electronic Media in Psychiatry
This chapter explores the rapidly evolving relationship between psychiatry and electronic media. Advances in digital technology have transformed how mental health information is accessed, how care is delivered, and how individuals understand and manage their psychological wellbeing.From telepsychiatry and electronic health records to mobile applications, social media, wearable devices, and artific
PSYCH 072: Medical Error
This chapter explores one of the most challenging and important realities in healthcare: medical error. Despite the dedication, expertise, and good intentions of clinicians, mistakes occur. Understanding why they happen—and how systems can reduce their occurrence—is essential to improving patient safety and the quality of psychiatric care.Medical error is often viewed through the lens of individua
PSYCH 069: Psychiatric Rating Scales
This chapter explores psychiatric rating scales, the structured tools used to quantify symptoms, monitor change, and support clinical decision-making. Psychiatry deals with many phenomena that are inherently subjective—mood, anxiety, psychosis, cognition, functioning, and quality of life. Rating scales provide a common language through which these experiences can be systematically assessed.At thei
PSYCH 068: Principles and Applications of Quantitative Electroencephalography in Psychiatry
This chapter explores quantitative electroencephalography (qEEG), a powerful technique that transforms the brain’s electrical activity into measurable patterns that can be analysed, compared, and interpreted. While conventional EEG allows clinicians to observe brain wave activity, qEEG extends this capability by applying advanced computational methods to reveal underlying neural dynamics.Every tho
PSYCH 067: Medical Assessment and Laboratory Testing in Psychiatry
This chapter explores one of the most important principles in psychiatric practice: psychiatric symptoms do not always originate from psychiatric illness. The assessment of patients presenting with psychological or behavioural symptoms requires careful consideration of underlying medical, neurological, endocrine, infectious, metabolic, and pharmacological causes.Psychiatry occupies a unique positi
PSYCH 066: Personality Assessment of Adults
This chapter explores the assessment of personality—the enduring patterns of thinking, feeling, relating, and behaving that shape how individuals experience themselves and the world around them. While psychiatric symptoms may fluctuate across time, personality provides the deeper framework through which those experiences are interpreted and expressed.Personality assessment seeks to understand the
PSYCH 065: Neuropsychological Assessment of Adults
This chapter explores the science and practice of neuropsychological assessment—the systematic evaluation of cognitive functioning to better understand the relationship between brain, behaviour, and mental processes.While psychiatric interviews reveal subjective experience and emotional functioning, neuropsychological assessment examines how the brain performs its most complex tasks. Attention, me
PSYCH 064: Practice Guidelines in Psychiatry
This chapter explores the role of practice guidelines in modern psychiatric care. As psychiatry has evolved into an increasingly evidence-based discipline, clinicians have been challenged to integrate scientific knowledge, clinical expertise, and individual patient needs into coherent treatment decisions. Practice guidelines serve as navigational tools within this complex landscape.At their core,
PSYCH 063: The Psychiatric Report and Outline for a Psychiatric Examination
This chapter explores the art and discipline of transforming psychiatric assessment into a structured psychiatric report. While interviews and examinations gather information, the report is where that information is analysed, organised, and communicated.Psychiatric reports serve many purposes. They guide clinical care, facilitate communication between professionals, support legal and administrativ
PSYCH 062: Psychiatric Interview, History, and Mental Status Examination of the Adult Patient
This chapter explores the foundations of psychiatric assessment: the psychiatric interview, the comprehensive clinical history, and the mental status examination (MSE). Together, these form the primary tools through which psychiatrists understand the experiences, symptoms, strengths, and struggles of the people they seek to help.Unlike many areas of medicine, psychiatry relies heavily upon narrati
PSYCH 061: Approaches from Philosophy and Psychology
This chapter explores the philosophical and psychological foundations that underpin our understanding of personality and psychopathology. It moves beyond empirical observation into the deeper questions that shape how we conceptualise human experience.Philosophical traditions have long grappled with the nature of self, consciousness, free will, and meaning. These questions are not abstract - they d
PSYCH 060: Other Psychodynamic Schools
This chapter explores the evolution of psychodynamic thought beyond classical psychoanalysis, highlighting a range of schools that expand, refine, and sometimes challenge Freud’s original ideas.These approaches share a common foundation - the importance of unconscious processes, early relationships, and internal conflict - but diverge in how they conceptualise the structure and dynamics of the min
PSYCH 059: Erik Erikson
This chapter explores Erik Erikson’s influential model of psychosocial development, which extends the understanding of human growth across the entire lifespan. Unlike earlier theories that focused primarily on childhood, Erikson proposed that development continues through a sequence of stages, each defined by a central psychological task.Each stage presents a tension - a conflict between two oppos
PSYCH 058: Psychoanalytic Theories and Treatment
This chapter explores the foundations and evolution of psychoanalytic theory, focusing on how unconscious processes shape thought, emotion, and behaviour. Originating in the work of Freud and developed across multiple schools in North America and Great Britain, psychoanalysis offers a framework for understanding the inner world of the mind.At its core is the concept of the unconscious - mental pro
PSYCH 057: Statistics and Experimental Design
This chapter provides the methodological backbone of psychiatric research - the tools that allow us to move from observation to reliable knowledge. Statistics and experimental design are not merely technical disciplines; they are the architecture through which truth is approximated.At its core, experimental design is about structure. How do we ask a question in a way that produces a meaningful ans
PSYCH 056: Epidemiology in Psychiatry
Epidemiology provides the lens through which psychiatry steps back and examines mental illness at the level of populations. Rather than focusing on individual cases, it asks broader questions: how common are disorders, who is affected, and what factors influence risk and outcome?This chapter introduces the foundational concepts of psychiatric epidemiology, including incidence, prevalence, risk fac
PSYCH 055: Evolutionary Foundations of Psychiatry
This chapter explores psychiatric phenomena through an evolutionary lens - asking not only how mental disorders occur, but why the human mind is vulnerable to them in the first place.Evolutionary psychiatry proposes that many features of the mind are shaped by natural selection to solve problems of survival and reproduction. Emotions such as fear, anxiety, attachment, and even low mood may have ev
PSYCH 054: Transcultural Psychiatry
This chapter explores how culture shapes every aspect of mental health - from symptom expression and explanatory models to help-seeking behaviours and treatment outcomes. Transcultural psychiatry challenges the assumption that psychiatric disorders are universal in form and meaning.Culture provides the framework through which individuals interpret distress. The same underlying experience may be de
PSYCH 053: Neurocentrism: Addiction and the Courtroom
This chapter examines the growing influence of neuroscience in legal and societal understandings of behaviour - particularly in the context of addiction. Neurocentrism refers to the tendency to explain complex human actions primarily, or exclusively, in terms of brain function.In addiction, advances in neuroscience have highlighted changes in reward pathways, impulse control, and decision-making s
PSYCH 052: Neuroscience of Psychoanalytic Object Relations
This chapter bridges two historically separate domains: psychoanalytic object relations theory and contemporary neuroscience. It explores how early relationships are not merely psychological experiences, but biologically embedded processes that shape the developing brain.Object relations theory proposes that internal representations of self and others are formed through early interactions with car
PSYCH 051: Normality and Mental Health
This chapter challenges one of the most deceptively simple questions in psychiatry: what does it mean to be “normal”?Rather than defining normality as the absence of illness, contemporary perspectives frame mental health as a dynamic process - the capacity to adapt to internal and external demands, sustain relationships, regulate emotion, and pursue meaningful goals.Statistical, cultural, and func
PSYCH 050: Biology of Memory
This chapter explores how memory is encoded, stored, and retrieved within the brain - not as a static archive, but as a dynamic and evolving biological process.Memory begins with encoding, where experience is transformed into neural activity. This is followed by consolidation, during which fragile traces are stabilised through synaptic and systems-level changes. Retrieval then reactivates these tr
PSYCH 049: Learning Theory
Learning theory provides one of the most powerful frameworks for understanding how behaviour is acquired, maintained, and changed. At its core, it asks a deceptively simple question: how do experiences shape what we do?This chapter explores the foundational models of learning, including classical conditioning, operant conditioning, and observational learning. Classical conditioning links stimuli t
PSYCH 048: Piaget and Cognitive Development
This chapter explores how human cognition develops across childhood through the pioneering work of Jean Piaget. Rather than viewing children as miniature adults, Piaget proposed that thinking evolves through distinct stages, each representing a qualitatively different way of understanding the world.At the core of his theory are two fundamental processes: assimilation and accommodation. Assimilatio
PSYCH 047: Sensation, Perception, and Cognition
This chapter explores how the mind transforms raw sensory input into meaningful experience. Sensation begins as the detection of physical stimuli - light, sound, touch - but perception is the act of organising and interpreting these signals into a coherent reality.The key insight is that perception is not passive. The brain actively predicts, filters, and shapes incoming information based on prior
PSYCH 046: Catatonia
Catatonia is one of the most striking and often misunderstood syndromes in psychiatry. It is not defined by a single disorder, but by a pattern of motor, behavioural, and physiological abnormalities that reflect a profound disturbance in the regulation of action.In this episode, we explore how catatonia can present across a spectrum - from marked immobility, mutism, and withdrawal, to states of ag
PSYCH 045: Neuropsychiatry of Neurometabolic and Neuroendocrine Disorders
The brain does not function in isolation. It is deeply dependent on metabolic processes and hormonal regulation - systems that operate throughout the body but exert powerful influence on cognition, mood, and behaviour. This chapter explores how disturbances in these systems manifest neuropsychiatrically.In this episode, we examine how metabolic disorders - including inborn errors and acquired cond
PSYCH 044: Psychiatric Aspects of Child Neurology
Child neurology and psychiatry are inseparable - because the brain itself is still under construction. This chapter explores how neurological conditions in childhood intersect with emotional, behavioural, and cognitive development.In this episode, we examine how early brain disturbances - whether genetic, structural, metabolic, or acquired - influence developmental trajectories. Unlike in adults,
PSYCH 043: Neuropsychiatric Aspects of Neuromuscular Diseases
Neuromuscular diseases are often defined by their effects on muscle strength and function. Yet their impact extends far beyond the physical domain, shaping cognition, emotion, behaviour, and identity. This chapter explores the neuropsychiatric dimensions of conditions affecting the peripheral nervous system and muscle.In this episode, we examine how diseases such as motor neurone disease, muscular
PSYCH 042: Neuropsychiatric Aspects of Headache
Headache is often considered a purely physical symptom - yet its experience is deeply intertwined with emotion, cognition, and perception. This chapter explores the neuropsychiatric dimensions of headache, particularly in conditions such as migraine and chronic daily headache.In this episode, we examine how headache arises from complex interactions between sensory pathways, brainstem systems, and
PSYCH 041: Neuropsychiatric Aspects of Prion Disease
Prion diseases are among the most unsettling conditions in medicine - rare, rapidly progressive, and fundamentally destructive. This chapter explores how abnormal protein folding can lead to profound neuropsychiatric decline.In this episode, we examine how prions - misfolded proteins - propagate by inducing normal proteins to adopt the same abnormal structure. This creates a self-amplifying cascad
PSYCH 040: Neuropsychiatric Aspects of Other Infectious Diseases (Non-HIV)
Infectious diseases can profoundly affect the brain, often in ways that blur the boundary between neurology and psychiatry. This chapter explores how non-HIV infections - bacterial, viral, fungal, and parasitic - can lead to a wide spectrum of neuropsychiatric presentations.In this episode, we examine how pathogens may directly invade the central nervous system or trigger indirect effects through
PSYCH 039: Neuropsychiatric Aspects of HIV Infection and AIDS
HIV is not only an infection of the immune system - it is also a disease of the brain. This chapter explores how HIV and AIDS affect the central nervous system, producing a spectrum of neuropsychiatric manifestations that evolve across the course of illness.In this episode, we examine how HIV enters the brain early in infection, leading to chronic neuroinflammation and neuronal injury. Even in the
PSYCH 038: Neuropsychiatric Aspects of Multiple Sclerosis and Other Demyelinating Disorders
The brain depends not only on structure, but on the integrity of its connections. Myelin - the insulating layer around nerve fibres - ensures that signals travel efficiently across networks. In demyelinating disorders such as multiple sclerosis (MS), this insulation is compromised, altering how information flows through the brain.In this episode, we explore how demyelination leads to both neurolog
PSYCH 037: Neuropsychiatric Aspects of Movement Disorders
Movement disorders are often understood through their motor features - tremor, rigidity, slowness, or involuntary movements. Yet the same neural circuits that govern movement also influence emotion, motivation, and cognition. This chapter explores the neuropsychiatric dimensions of these conditions.In this episode, we examine how basal ganglia–thalamocortical circuits regulate not only motor outpu
PSYCH 036: Neuropsychiatric Consequences of Traumatic Brain Injury
Traumatic brain injury (TBI) is not a single event, but the beginning of a process. This chapter explores how mechanical injury to the brain leads to a cascade of neuropsychiatric consequences - unfolding across acute, subacute, and chronic phases.In this episode, we examine how forces such as acceleration, deceleration, and rotational injury disrupt neural tissue, particularly affecting frontal a
PSYCH 035: Neuropsychiatric Aspects of Epilepsy and Psychogenic Nonepileptic Seizures
Seizures are among the most dramatic manifestations of brain dysfunction - but not all seizures arise from the same mechanisms. This chapter explores the neuropsychiatric dimensions of epilepsy alongside psychogenic nonepileptic seizures (PNES), where outwardly similar events emerge from fundamentally different processes.In this episode, we examine epilepsy as a disorder of abnormal, excessive neu
PSYCH 034: The Neuropsychiatry of Brain Tumors
Brain tumours do not merely occupy space - they alter function. This chapter explores how focal growths within the brain can produce profound changes in cognition, behaviour, and personality, often before neurological signs become obvious.In this episode, we examine how tumour location, size, and rate of growth influence clinical presentation. Slowly growing lesions may allow partial adaptation, l
PSYCH 033: Neuropsychiatric Aspects of Cerebrovascular Disorders
The brain depends on a constant, finely regulated blood supply. When this flow is disrupted - whether abruptly, as in stroke, or gradually, as in vascular disease - the consequences extend far beyond motor deficits. This chapter explores how cerebrovascular disorders reshape cognition, emotion, and personality.In this episode, we examine how different vascular events affect specific brain regions
PSYCH 032: The Neuropsychiatric Approach to the Patient
This chapter is not about a disorder, but about a way of seeing. The neuropsychiatric approach reframes the patient encounter as an integration of neurology and psychiatry - recognising that behaviour, cognition, and emotion are expressions of brain function shaped by personal meaning.In this episode, we explore how clinicians navigate this interface. The task is not simply to diagnose, but to loc
PSYCH 031: Neuroscience of Substance Use Disorders
Substance use disorders are often misunderstood as failures of will. This chapter reframes them as disorders of brain systems governing reward, motivation, learning, and control.In this episode, we explore how substances act on neural circuits - particularly those involving dopamine - to produce powerful reinforcement signals. These signals are not merely pleasurable; they reshape the brain’s prio
PSYCH 030: Learning Theory and Psychosis, Anxiety, and Addiction
At its core, the brain is a learning system - constantly updating itself based on experience. This chapter explores how fundamental learning mechanisms, when altered, can give rise to psychiatric conditions such as psychosis, anxiety, and addiction.In this episode, we examine key principles of learning theory, including classical conditioning, operant conditioning, and reinforcement learning. Thes
PSYCH 029: Neuropsychiatry of Self
The sense of self feels immediate and unquestionable - yet it is a construction. This chapter explores the neuropsychiatry of self, examining how brain systems generate the experience of being a coherent, continuous individual.In this episode, we examine how networks such as the default mode network contribute to self-referential processing - enabling reflection, autobiographical memory, and the s
PSYCH 028: Functional Brain Connectivity and Psychopathology
The brain is not simply a collection of regions, but a network defined by how those regions communicate. This chapter explores functional connectivity - the dynamic relationships between different parts of the brain - and how alterations in these patterns contribute to psychopathology.In this episode, we examine how brain regions coordinate their activity over time, forming networks that support f
PSYCH 027: Radiotracer Imaging with Positron Emission Tomography and Single Photon Emission Computed Tomography: Fundamental Principles, Methodology and Role in Neuropsychiatric Research
While MRI shows structure and EEG captures electrical activity, radiotracer imaging reveals something different: the brain’s molecular activity in action. This chapter explores PET and SPECT - techniques that allow us to track specific biological processes in vivo.In this episode, we examine how radiolabelled tracers bind to particular receptors, transporters, or metabolic pathways, enabling us to
PSYCH 026: Electroencephalography in Psychiatry
If imaging reveals structure, electroencephalography (EEG) captures activity in real time. This chapter explores how electrical signals generated by neuronal populations can be recorded from the scalp, offering a dynamic view of brain function.In this episode, we examine how EEG reflects synchronised activity across neural networks, producing patterns that can be analysed in terms of frequency, am
PSYCH 025: Nuclear Magnetic Resonance Imaging and Spectroscopy: Basic Principles and Recent Findings in Neuropsychiatric Disorders
Much of psychiatry has historically relied on inference - understanding brain function indirectly through behaviour and experience. Nuclear magnetic resonance (NMR) techniques, including MRI and spectroscopy, have transformed this landscape, allowing us to visualise both structure and chemistry in vivo.In this episode, we explore the principles underlying magnetic resonance imaging - how magnetic
PSYCH 025: Nuclear Magnetic Resonance Imaging and Spectroscopy: Basic Principles and Recent Findings in Neuropsychiatric Disorders
Much of psychiatry has historically relied on inference - understanding brain function indirectly through behaviour and experience. Nuclear magnetic resonance (NMR) techniques, including MRI and spectroscopy, have transformed this landscape, allowing us to visualise both structure and chemistry in vivo.In this episode, we explore the principles underlying magnetic resonance imaging - how magnetic
PSYCH 024: Computational Modelling Approaches to Psychiatry
Psychiatry often deals with processes that cannot be directly observed - beliefs, predictions, learning, and perception. Computational psychiatry offers a way to formalise these processes, translating them into models that can be tested, refined, and understood.In this episode, we explore how mathematical and computational frameworks are used to describe how the brain processes information. Concep
PSYCH 023: Basic Systems Neuroscience
Understanding individual neurons is only the beginning. This chapter shifts the lens to systems neuroscience - exploring how networks of interconnected regions work together to produce cognition, emotion, and action.In this episode, we examine how the brain operates as a set of distributed systems rather than isolated modules. Circuits linking cortical and subcortical regions coordinate functions
PSYCH 022: Animal Models in Psychiatry
Much of what we understand about brain function and psychiatric illness has been built through animal research. Yet modelling the human mind in animals is inherently complex. This chapter explores how animal models are used in psychiatry - and the limits of what they can truly represent.In this episode, we examine different types of animal models, including those based on genetic manipulation, pha
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