Psychiatry
Foundations of Psychiatry and Behaviour
Foundations of psychiatry for MBBS and NEET-PG: biopsychosocial model, ICD and DSM, stress, personality, learning and motivation, mapped to NMC codes PS1 and PS2.
MedNext Academy | 3 min read
Foundations of Psychiatry and Behaviour
Foundations of psychiatry for MBBS and NEET-PG: biopsychosocial model, ICD and DSM, stress, personality, learning and motivation, mapped to NMC codes PS1 and PS2.
This chapter lays the conceptual base for the whole subject. It covers the magnitude of psychiatric illness, the biopsychosocial model, the ICD and DSM classifications, and the psychological foundations of stress, personality, learning and motivation that later chapters build upon.
High-yield: Foundations of Psychiatry and Behaviour
- Psychiatry deals with disorders of thought, mood, perception, cognition and behaviour, and mental illness contributes a large share of the total disease burden in India.
- The biopsychosocial model explains illness through interacting biological, psychological and social factors rather than a single cause.
- The two main classification systems are the WHO ICD, used widely in India, and the American DSM.
- Stress is the response to demands that tax or exceed a person's coping resources, and it has physical, emotional, cognitive and behavioural components.
- The general adaptation syndrome describes alarm, resistance and exhaustion stages of the stress response.
- Personality is the enduring pattern of thinking, feeling and behaving that makes a person distinctive, shaped by temperament and environment.
- Defence mechanisms are unconscious strategies to reduce anxiety, ranging from mature ones such as sublimation to immature ones such as denial and projection.
- Learning is a relatively permanent change in behaviour from experience, described by classical conditioning, operant conditioning and social learning.
- Classical conditioning pairs a neutral stimulus with an unconditioned stimulus, as in Pavlov's work; operant conditioning shapes behaviour through reinforcement and punishment.
- Motivation is the drive that initiates and sustains goal-directed behaviour, often illustrated by Maslow's hierarchy of needs.
- Normality can be defined statistically, socially, or by the absence of distress and impairment, and no single definition fits every situation.
- Time management, study skills, a balanced diet and regular sleep protect a student's mental health and academic performance.
- Good coping strategies are problem-focused or emotion-focused and can be taught to build resilience.
- Mental health promotion aims to prevent illness, reduce stigma and build life skills across the population.
Core concepts at a glance
- **Biopsychosocial model:** Illness arises from interacting biological, psychological and social factors, not a single cause.
- **Classification:** ICD (WHO, used in India) and DSM (American Psychiatric Association).
- **Stress response:** General adaptation syndrome: alarm, resistance and exhaustion.
- **Learning:** Classical conditioning, operant conditioning and social learning.
NMC competencies in this chapter
- **PS1.1:** Magnitude and aetiology of psychiatric disorders
- **PS1.2:** Definition and components of stress and coping
- **PS1.3:** Time management, study skills and healthy lifestyle
- **PS1.4:** Principles and components of learning
- **PS2.1:** Personality development and motivation
- **PS2.2:** Concepts of normality and abnormality
- **PS2.3:** Biological, psychological and social basis of behaviour
- **PS2.4:** Defence mechanisms and their clinical relevance
- **PS2.5:** Foundations of psychiatric assessment and classification
Frequently Asked Questions
What is the biopsychosocial model?
It explains mental illness as the product of interacting biological, psychological and social factors rather than a single cause, and it guides a broad approach to assessment and treatment.
Which classification systems are used in psychiatry?
The WHO ICD system is used widely in India, and the American DSM is the other main system. Both provide agreed criteria so that diagnoses are consistent between clinicians.
What are defence mechanisms?
They are unconscious mental strategies that reduce anxiety, ranging from mature ones like sublimation to immature ones like denial and projection, and they help explain everyday and abnormal behaviour.
Why do foundations matter for NEET-PG?
Concepts of classification, stress, learning theories and defence mechanisms recur across psychiatry questions, so a firm grasp here makes the clinical chapters much easier.
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