PSYCH 202 Lecture Notes - Lecture 3: Demyelinating Disease, Grey Matter, Neuroglia
Document Summary
The stuff of brains: neurons (nerve cells, glia (glial cells) Sensory neurons: receive information from the external world and convey this information to the brain via the spinal cord: motor neurons: carry signals from the spinal cord to the muscles to produce movement. Interneurons: connect sensory neurons, motor neurons, or other interneurons. Gray matter / white matter: gray matter: cell bodies, dendrites, axon terminals of neurons, white matter: bundles of axons connecting different parts of gray matter to each other. Multiple sclerosis: demyelinating disease that causes deterioration of myelin sheath, which slows down transmission, transmission= slows down communication between neurons. Neuronal communication: electric sig(cid:374)ali(cid:374)g: che(cid:373)icals traveli(cid:374)g i(cid:374)/out of the cell produce cha(cid:374)ges i(cid:374) the cell"s electric potential, chemical signaling: electric changes in the cell result in the release of chemicals into synapse. Postsynaptic potentials (psp: neurotransmitters binding to receptor sites of postsynaptic cell produce voltage changes, excitatory postsynaptic potentials (epsps) depolarize the cell.
