PSY 1101 Chapter : The functioning brain.pdf

• School: University of Ottawa
• Department: Psychology
• Course: PSY 1101
• Professor: Brenda Baird

Document Summary

Inner & outer parts of the nervous system. The central nervous system [cns] consists of the brain and spinal cord. The pns gathers and sends information to and from the rest of the body. Myelin sheath torn can impact neuronal transmission. If severe enough can result in paralysis. Dendrites: a neuron"s branchy extensions that receive messages and conduct impulses toward the cell body. Axon: the neuron extension that passes messages through its branches to other neurons or to muscles or glands. Myelin sheath: a fatty tissue layer segmentally encasing the axons of some neurons; enables vastly greater transmission speed as neural impulses hop from one node to the next. Afferent: interneurons: messenger cells/most often in the cns, motor neurons: contract muscle to pull away which requires communication between. Your spine"s interneurons trigger your hand to pull away from a fire before you can say. This is an example of a reflex action.