PSY100H1 Chapter Notes -Schwann Cell, Meiosis, Fetal Alcohol Spectrum Disorder
65
PSY100H1 Full Course Notes
Verified Note
65 documents
Document Summary
Chapter 5: genetics and the dev of the human brain. Genetic disorders: down syndrome, trisomy 21 (3 copies of chromosome 21) Related to maternal age: symptoms: heart deformities, shorter life expectancy, high risk of. Alzheimer"s: fragile-x syndrome, fmr-1 gene on the x chromosome normally has 6-50 codon repeats but w/ 200 or more repeats fragile x: typical intelligence to moderate retardation, low-set ears, large forehead and jaw, males unusual social withdrawl. Adult neurogen: some new neurons are added to mature brain. Imp role in mod of brain in response to experience: protects brain from effects of stress, antipressents increase ~ Alzhemier"s disease: begins w/ mild memory loss. This type can dissolve and travel within brain: one of first areas of brain to show measurable changes is posterior cingulated cortex, later hippocampus, temporal lobe, association cortex areas, amygdala + limbic structures connected to hypothal.
