PSY 260 Lecture Notes - Lecture 4: Cerebral Cortex, Logarithmic Scale, Current Density
6 Sep 2018
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I(cid:374) predi(cid:272)ti(cid:374)g the (cid:272)og(cid:374)iti(cid:448)e (cid:272)apa(cid:271)ility of (cid:448)arious a(cid:374)i(cid:373)al spe(cid:272)ies, it"s i(cid:373)porta(cid:374)t to take into account both brain size and body size. In the animal kingdom, brains tend to be about power of body mass. Hu(cid:373)a(cid:374)s ha(cid:448)e a ratio of 7. 5 (cid:894)larger tha(cid:374) (cid:862)typi(cid:272)al(cid:863)(cid:895) Maybe, but there are anatomical limits (esp. Also, the cerebral cortex is just 1. 5-5mm thick. The brain has already cleverly solved that limitation with folds. But (cid:272)o(cid:373)(cid:373)u(cid:374)i(cid:272)atio(cid:374) i(cid:374) the (cid:271)rai(cid:374) is (cid:862)(cid:374)oisy. (cid:863) would (cid:271)e like tur(cid:374)i(cid:374)g up the volume on a static-filled radio signal. Already the greediest body part, using 20% of calories burned at rest. (for newborns, 65%) Current density of neurons, and current computational style, may be at or near. Long-term memories consist of networks of synapses in the cortex. Protein production and dendritic formation required. (this is why long-term memories take time to physically form in the brain. ) Hippocampus is required for consolidation. (think of h. m. !)
