PSY 100 Lecture Notes - Lecture 22: Santa Barbara City College, Speech Disorder, Catatonia
Document Summary
Beliefs that are not based on reality (for the person"s culture, delusions of persecution, reference, grandeur, control, bodily change. Disorganized speech: loosened or unusual associations, abrupt or unusual associations, abrupt shifts, strange words. Hallucinations: alternations in perceptions, auditory, visual, tactile, taste and smell. Negative symptoms: blunted or inappropriate affect, poverty of speech, lack of motivation, inability to experience pleasure, asocial. Two or more characteristic symptoms (at least of these: delusions, disorganized speech, hallucinations, negative symptoms, grossly disorganized or catatonic behaviour. Presence of something that is normally absent. Absence of something that is normally present. Flat affect; poverty of speech; lack of motivation. Heritability rates: concordance rate higher for identical twins than fraternal twins (25-50% vs. 10- 17%: also higher for biological parents compared to adoptive parents. Dopamine hypothesis: excess receptors for d4, over activity of dopamine in areas that regulate emotion, motivation, cognitive functioning, may explain positive symptoms.
