PSY 101 Lecture Notes - Lecture 3: Hemiparesis, Derek Boogaard, Myelin
--nervous system handles informaion just as circulatory system handles blood. Mainly provide structure, support and nourishment to neurons. Brief shit in neurons" electrical charge that: soma---axon---terminal buton. Neurotransmiters are received by dendrites/soma of next neuron. This may cause second neuron to ire (neuron impulse) The all-or-none law: either neuron ires or it doesn"t. --strength indicated by the rate of firing (how oten) Voltage change at receptor site (soma/dendrites) on postsynapic cell membrane. When neurotransmiters are soaked up by presynapic membrane (recycle) Curare: blocks recepion of ace- cannot move. Black widow spider: loods of ace-, death. Dopamine---lined to muscle acivity and pleasurable emoions. Depression: to litle ne (snris---selected norepinephrine retake inhibitors---increase ne around) Serotonin: lower acivity level and causes sleep related to posiive emoions, anxiety. Organizaion or neurons system: central neurons system (cns)---brain, spinal cord, peripheral neurons system (pns)---outside. Houses bundles of axons that carry brain"s messages to body. Corpus callosum: connect l and r cerebral hemispheres.