PSY 2301 Study Guide - Midterm Guide: Substantia Nigra, Hypertonia, Area Postrema
14 Nov 2018
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Amyotrophic means muscle weakness; lateral sclerosis means hardening of the lateral spinal cord. Loss of dopamine neurons in the substantia nigra. When given l-dopa parkinson"s patients can move again. Turns to dopamine at synapses frozen addict. Caused by synthetic heroin that was contaminates, causes parkinson like symptoms. Was a contaminant that processed as a neurotoxin cognitive enhancement. Epsps excitatory postsynaptic potentials depolarize. Ion flow = open cl- channels which allows for k+ influx. Ion flow = open na+ channels, influx of na+ Epsps and ipsps are added and the overall result = whether or not an action potential occured. What are the two main types of summation (temporal and spatial) If two epsp/ipsp happen quick = one large. Summation may trigger action potential by acting on voltage-gated channels at the axon hillock. Be able to describe neural activity for touch (sensory) and for muscle activity (motor) situations. Open up sodium channels depolarization action potential.
