Psychology 3226A/B Lecture Notes - Lecture 4: Preoptic Area, Aphasia, Corpus Callosum
15 Apr 2015
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Document Summary
Raisman and field (1970, 1973: first documentation of sex differences in rat brain, subtle differences in dendritic synapses found in the hypothalamus, small difference at the level of the cell, diference between number of dendritic spines (males have more suggesting they had higher levels of connectivity within the area) Nottebohm and arnold (1976: discovered massive sex differences in song control regions of songbirds, brain regions controlling song production 7 10 times larger in males, hadn"t really been seen in any of the mammal models, followed quickly by discovery of sdn poa in mamals, although songbird discovery spurred much of the mammal research it has turned out to not be an ideal model for the organizational hypothesis responds differently than mammalian system. Mpia known to be important for sexual behavior detailed electron microscope studies indicated sex differences in synapse times dendritic spine synapses: females > males dendritic shaft synapses, males > females.
