CSB430H1 Lecture Notes - Cerebral Cortex, Metaphase, Somite
3 May 2013
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Document Summary
Edinger (early 1900s) - neuroanatomist: did this analysis and concluded, major evolutionary event in mammalian brain evolution was the increase in size of telencephalon. B/c looked at different mammalian brains and parts of brain; compared sizes concluded most changes in telencephalon. Same conclusion when considering all vertebrates: then extended to non-mammalian vertebrates, didn"t actually look at all, just had few samples. Schematic view of dorsal side of an elongated central nervous system. From anterior to posterior, prosencephalon (aka forebrain; comprised of telencephalon and diencephalon), mesencephalon (midbrain), rhombencephalon (aka hindbrain; includes medulla oblongata, cerebellum) Series of enlarged structures as move from rostral end to caudal end. Found main changes happening in telecephalon, not much happening in other parts. Edinger looked at these components and looked at their sizes. Sizes of telencephalon does change but magnitude of change relative to body. Thought change of telencephalon = major change. Associated newest part of telencephalon = neocortex.
