ALDS 3604 Lecture Notes - Lecture 2: Myelin, Neural Development, Schwann Cell

• School: Carleton University
• Department: Applied Linguistics and Discourse Studies
• Course: ALDS 3604
• Professor: Jacquie Ballantine

Document Summary

It has the soma, axon, and the terminal buttons. The axon is covered in white matter, in the myelin sheath. S cells have a better chance at regeneration, which is why scientists are hopeful in treating. The nodes of ranvier has an effect on the speed of transmission. Efferent nerves: signals sent out from the brain (motor) Afferent nerves: sensations coming in, signals going into the brain. Cerebrum: made up of the two hemispheres and their lobes. Brain stem: where the group of nuclei that controls consciousness and higher level functioning lies. Diencephalon: part of the forebrain containing the thalamus and the hypothalamus. Neural development is what we are born with. It"s the neural circuits that are with us from birth. Neurogenesis occurs prenatally, by the 25th gestational week, and that"s when a lot of neural circuits are created. Neurogenesis is our brain ability to create neural developments after external stimuli (trauma). Neurons developed by the 25th gestational week.