PSYCH 202 Lecture Notes - Lecture 27: Prefrontal Cortex, Bilateral Cingulotomy, Exposure Therapy
14 Feb 2018
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Document Summary
Obsessive-compulsive disorder: 2 loops, striatum-dorsomedial prefrontal cortex pathway, striatum-orbitofrontal cortex pathway, at rest, people with ocd have more active pathways, dorsal: habits, ventral: rewards, reducing anxiety is rewarding. Schizophrenia: affects about 1% of the population. Positive and negative symptoms: positive, things present in people with schizophrenia (that are not present in people without sch, hallucinations. False perceptions: perceiving things that don"t have an external source, delusions. Lack of cohesiveness of someone"s thoughts: rapidly jumping in their thoughts from topic to topic, negative, features of normal cognition/behavior that are lost in people with schizophrenia, flat affect (emotional expression) Impoverished thought and speech: answer in one to two words. Saying a lot less than normally expected: at least one positive symptom needed for diagnosis. Onset of schizophrenia: genes plus experience, biological predisposition and early experience. Symptoms typically appear in adolescence or early adulthood.
