PSYCH 160A Lecture Notes - Lecture 3: Corpus Callosum, Grey Matter, Cognitive Flexibility
25 Jan 2020
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Document Summary
Residual brain body weight is a good predictor of cognitive function between species. Only a very small correlation with iq. Residual brain size is more strongly correlated with health than any measures of intelligence. Brain weight, volume and cortical thickness all change throughout development. Brain weight and volume increases in youth, then slowly declines. 80% of postnatal brain weight gain occurs between birth and age 2. Reaches adult weight between 10-12 years of age. Peaks slightly earlier in females vs males. By mid-40"s, we have lost about 5% of brain volume. Brain weight and volume reflect the composition of different structures. Brain volume in sensory and motor areas increases earlier in development than other brain regions. Gray & white matter development matures rapidly over the first 3 years of life and varies across brain regions. White matter development based on the slides. Left top & middle: months 1 & 2. Right: months 7-9 (top) and month 9.
