PSY 260 Lecture Notes - Lecture 3: Santiago Ramón Y Cajal, Golgi'S Method, Axon Terminal
Document Summary
Two basic cell types in the brain (1:10: neurons: cells that send and convey information using electrical pulses that result in the release of neurotransmitters (about 100 million) Each neuron receives information from other neurons, integrates it, the distributes to other neurons: glia: cells that provide support for neurons. The do not generate electrical impulses or release neurotransmitters. Developed by ramon y cajal: 1) neurons are structurally, metabolically, and functionally independent, 2) information is transmitted through tiny gaps between neurons later named synapse. 10^15 synapses in the body: components. Axon: sends information to other neurons: axon hillock: a cone shaped area of the cell body that gives rise to the axon. Myelin sheath: insulates the neuron to help send signals faster: nodes of ranvier: gaps in myelin cover on the axon, when deteriorates, known as ms (multiple sclerosis) Cell membrane: a semi-permeable barrier between the cell and the extracellular uid: functional zones.
