Questions
2–3 descriptive questions in university theory papers
Difficulty
Medium-Hard
Importance
High yield for nursing, MBBS, and clinical psychology exams
Overview
Major psychiatric disorders represent a core domain in behavioral health, encompassing deviations in thought, mood, and anxiety regulation. Mastering these is crucial for clinical exams and board assessments, as they require a structured understanding of diagnostic criteria, etiology, and primary interventions.
Schizophrenia and Psychotic Disorders
Schizophrenia is a chronic, severe mental disorder characterized by disturbances in thought processes, perception, and emotional responsiveness. Exam questions focus on differentiating between positive symptoms like hallucinations and negative symptoms like avolition.
- Positive symptoms: Hallucinations, delusions, disorganized speech
- Negative symptoms: Anhedonia, alogia, affective flattening
- Dopamine hypothesis: Overactivity in the mesolimbic pathway
- Structural changes: Ventricular enlargement, decreased gray matter volume
- Diagnostic requirement: Symptoms present for at least 6 months
Mood Disorders
Mood disorders represent a group of mental health problems primarily characterized by emotional disturbances, most notably Major Depressive Disorder (MDD) and Bipolar Disorder. Aspirants must clearly distinguish between manic and hypomanic episodes based on duration and severity.
- MDD: Depressed mood or loss of interest for at least 2 weeks
- Bipolar I: Presence of at least one full manic episode
- Bipolar II: Hypomanic episodes with major depressive episodes
- Monoamine hypothesis: Deficiency of serotonin, norepinephrine, or dopamine
- SIGECAPS acronym for depression: Sleep, Interest, Guilt, Energy, Concentration, Appetite, Psychomotor, Suicidality
Anxiety Disorders
Anxiety disorders involve excessive fear, worry, and behavioral disturbances that significantly impair daily functioning. The focus here is on understanding the spectrum ranging from Generalized Anxiety Disorder (GAD) to specific phobias and panic disorders.
- GAD: Excessive worry for more than 6 months about various activities
- Panic Disorder: Recurrent unexpected panic attacks with apprehension
- Social Anxiety: Fear of scrutiny in social or performance situations
- Amydgala hyper-reactivity: Neurological correlate of heightened fear response
- First-line pharmacotherapy: SSRIs and SNRIs
Exam Tip
When writing descriptive answers, always structure your response using the DSM-5 criteria format: clinical features, duration requirements, and differential diagnosis.
Common Mistakes
- Confusing negative symptoms of schizophrenia with clinical depression.
- Failing to mention the 6-month duration criteria for Schizophrenia during clinical diagnosis questions.
- Misidentifying the difference between Bipolar I (mania required) and Bipolar II (hypomania only).
More Revision Notes
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