PSY341H5 Lecture Notes - Lecture 3: Dual Diagnosis, Social Skills, Informed Consent
Document Summary
Organic (1/3: clear biological basis, usually severe/ profound. Cultural-familial (2/3: causes not well understood, usually mild. Risk factors: biomedical: genetic factors, chromosome abnormalities, single-gene conditions, neurobiological factors, prenatal or perinatal exposure (teratogens, infections, complications with pregnancy/delivery, childhood medical conditions (traumas, infections, poisonings) Chromosome abnormalities: 1 in 1000 births, 95% of cases caused by trisomy-21, risk increases with maternal age, often associated with heart defects, physical features: small skull, large tongue, almond-shaped eyes, short crooked 5th finger. Mutation of the fmr1 gene on the x chromosome. Associated with mild to moderate intellectual disability (but also profound disability or normal intelligence) Physical features: large forehead, prominent jaw, low, protruding ears. Behaviour and learning difficulties (national fragile x foundation) Chromosome abnormalities: prader-willi syndrome: not inherited spontaneous genetic defect, https://www. youtube. com/watch?v=0r1srqlnzyc. Chromosome abnormalities: angelman syndrome: not inherited spontaneous genetic defect, usually associated with moderate to severe intellectual disability, https://www. youtube. com/watch?v=u5j0kvfstta.
