PSB-2000 Study Guide - Low Birth Weight, Preterm Birth, Twin Study
Document Summary
Positive (additions to a person"s being) behavioral symptoms: behaviors that are present that shouldn"t be, psychotic: Increased activity in the thalamus, hippocampus, cortex: disorganized: Negative behavioral symptoms: behaviors that are absent that should be present, weak: Working memory: stable and hard to treat. 1% of people in us; more common in us and europe than 3rd world countries: rates are dropping and case getting less severe since mid-1900"s don"t know why, more common in men, and earlier onset in men. Quick onset, often in response to major emotionally traumatic event. With age, psychotic episodes get long and remissions get shorter. Mz still have just 48% concordance why? (cid:222) maybe a gene is activated in one and suppressed in another. Maybe more similar prenatal/neonatal environment for dz twins than siblings: adoption studies. More resemblance to biological parents than adoptive parents. One study showed that home (adoptive) environment must be somehow dysfunctional for effect from biological parents to manifest (cid:222) (cid:222) (cid:222)
