PSY 333D Lecture Notes - Lecture 4: Dura Mater, Pia Mater, Auditory Cortex
Document Summary
Depression is heritable but needs to be exposed to certain things to express. Ccr5 gene - deletion - lower expression of hiv (need to be exposed) Cholesterol apol4 - changes in diet more sensitive - linked to alzheimer"s (more than 3) Epigenetics - environmental factors and stressors that affect which genes are accessible to be expressed or not. (methylation, acetylation) - histones (proteins dna wraps around) Sometimes always on, sometimes always off - changing between - epigenetics. As twins age - epigenetic changes increase since their lives are different. You are what you eat, what your parents eat, your parents, etc. As you age - epigenetic changes accumulate - differences. Rat experiment - fat/skinny/yellow/brown - agouti gene - expression. Brain - 3lbs - uses 20% of daily energy - 2 hemispheres - 14 pizza x 2. Brain development involves both cell growth and death.
