PSYC20008 Lecture Notes - Fall 2017 Lecture 7 - Apoptosis, White matter, Dentate gyrus
20 Sep 2018
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Mop up excess neurotransmitters emitted from synapses. Feed neurons by supplying nutrients and neurotransmitter precursors. Control where and when neurons will make new synapses: oligodendrocytes. Wrap tips around the axons of neurons and extrudes myelin, creating sheaths that help speed conduction of electrical activity along the axon. Myelin (cid:449)hite (cid:373)atter" of the (cid:271)rai(cid:374: schwann cells. Form a layer around the axon, helping conduct electrical impulses. Have their bodies in the ventricular zone and extend fibres radially outwards. Have cup-like feet in the ventricular zone and the fibres extend to the pia mater, located at the outer surface of the future cerebral cortex: next set of brain cells cajal-retzius cells. Establish themselves in a layer beneath the pia matter. Second set of neurons form a layer beneath the c-r cells, and these neurons constitute the first 6 layers of the cerebral cortex neurogenesis.
