PSYC 465 Lecture Notes - Lecture 4: Increment And Decrement Operators, Myelin, Excitatory Postsynaptic Potential
14 Feb 2017
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Neurotransmitter effects: excitatory . 5 mv, inhibitory 1 mv, these will add and subtract from each other as they occur - a process called summation ( ) When two neurons fire into another neuron at the same time, the overall input is greater than if they had fired separately. Spatial - the addition of inputs from two or more adjacent pre- synaptic endings at approximately the same time. Temporal - the addition of inputs from one pre-synaptic ending firing repeatedly close together in time. Both spatial and temporal summations happen at the same time and are constantly occurring. Ipsp and epsp get smaller with time and distance. Temporal summations decrease as time passes, but if the neuron keeps firing, the neuron will continue to increase. Axon hillock - the beginning of the axon. Action potentials vs. ipsps and epsps: contrasts between the rules of operation, action potentials. Either firing 100% or not firing at all, no in between.
