PSYC 401 Lecture Notes - Lecture 5: Neural Development, Neural Plate, Neural Tube
Document Summary
Brain weight: at birth brain weight ~ 350 gm, at one year brain weight ~ 1,000 gm, adult brain weight ~ 1,200 to 1,400 gm. Stages of neural development: proliferation, migration, differentiation, myelination, synaptogenesis. Only way it can happen is through chemical pathfinding. Neural development: pruning of synaptic connections getting rid of unneeded connections. Environment: genetics provide an approximate blueprint for assembling the cns, environmental factors can influence the development of the brain, rats raised in enriched environments, thicker cortex, more dendritic branching, improved performance on many learning tasks, plasticity . 4. 17: (a) fish reared in isolation has fewer branches less chance for synaptic, (b) fish reared in group has more neuronal branches more of a chance for connections to form synaptic connections to form. Cell loss is normal about in cerebral cortex. With chronic schizo, way more cortical cell loss.
