PSYC 1010 Lecture Notes - Lecture 4: Nervous Tissue, Brainstem, Cerebrospinal Fluid

• School: York University
• Department: Psychology
• Course: PSYC 1010
• Professor: Gerry Goldberg

Document Summary

Communications become comprehendible when they are in a form of a pattern. For example, when someone is talking their voice makes vibrations. Each vibration by itself may provide little information but all the vibrations together from meaningful patterns of the information. Nervous tissue consists of two types of cells: Glia cells: provides structural support and insulation for neurons. Neurons: individual cells in the nervous system that receive, integrate, and transmit information. Most neurons communicate among themselves but a small minority receives signals from outside . Some dendrites stimulate the soma to fire and some try to do the opposite. Axon sends information (electrical impulse) away from soma onto other neurons. Neuron is ready to release a electrochemical reaction (at rest is like a tiny battery) Resting potential: a stable, negative charge when the cell is inactive. Action potential: a very brief shift in a neurons" electrical charge that travels along an axon.