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Abnormal Psychology Overview F Is mental illness different from medical illness? F How common is mental illness? F How is mental illness diagnosed? F.

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Presentation on theme: "Abnormal Psychology Overview F Is mental illness different from medical illness? F How common is mental illness? F How is mental illness diagnosed? F."— Presentation transcript:

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2 Abnormal Psychology

3 Overview F Is mental illness different from medical illness? F How common is mental illness? F How is mental illness diagnosed? F Examples of mental disorders

4 The Mind-Body Problem F Is mental illness distinct from medical illness? F Assumes a duality of mind and body F Reminder: everything we think and do is related to brain activity

5 How Common is Mental Illness? F About 50% of the population experiences at least one mental illness. F Almost everyone will either have a mental illness or know somebody who does

6 Diagnosing Psychological Disorders F Diagnosis has pros and cons F Reliability varies according to diagnostic method and type of disorder F Use of DSM-IV

7 DSM-IV Axes F 1. Major Clinical Syndromes F 2. Personality Disorders and Mental Retardation F 3. General Medical Conditions F 4. Psychosocial and Environmental Problems F 5. Global Assessment of Functioning

8 Examples of Axis I Disorders F Mood Disorders –Major Depressive Disorder F Anxiety Disorders –Obsessive Compulsive Disorder F Schizophrenia and Other Psychotic Disorders

9 Major Depressive Disorder F bad mood F lack of interest or motivation F abnormal eating F abnormal sleeping F difficulty concentrating F feeling worthless F suicidal thoughts

10 MDD: Possible Causes F Genetic predisposition F Neurotransmitter imbalance, e.g. insufficient serotonin F Stress and related hormonal changes, e.g. increased cortisol level F Learned Helplessness

11 Obsessive-Compulsive Disorder F obsessions: persistent, irrational thoughts F compulsions: impulses to perform repeated behaviors

12 OCD: Possible Causes F Genetic predisposition F Neurotransmitter problem, e.g., underactive GABA system (inhibitory neurotransmitter) F Brain abnormality, e.g., decreased white matter (axons) F Learned response to reduce anxiety

13 Schizophrenia F NOT “split personality” F Disordered thinking F Symptoms vary according to subtype

14 Paranoid Schizophrenia F Delusions –Grandeur –Paranoia –Reference F Hallucinations, esp. auditory

15 Catatonic Schizophrenia F Disordered movement –Rigidity –Wild movement

16 Disorganized Schizophrenia F Disorganized speech –Loose associations –Neologisms F Hallucinations F Delusions F Inappropriate Affect

17 Schizophrenia: Other Subtypes F Undifferentiated: pattern does not fall into any of the other categories F Residual: No current symptoms, but previous episodes of symptoms

18 Schizophrenia: Possible Causes F Genetic predisposition F Abnormality in brain function/structure, e.g., frontal lobes F Early exposure to viruses F Abnormal dopamine system –Too much: positive symptoms –Too little: negative symptoms


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