PSY 368 Lecture Notes - Lecture 3: Electric Potential, Receptive Field, Neurophysiology
11 Sep 2017
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Excitatory nt will tend to incr firing rte of neuron; inhibitory nt tend to reduce firing rte. Excitatory & inhibitory sig from pre-syn neurons are summed by the post-synaptic neuron. Start with strong excitatory nt and slowly introduce more and more inhibitory nt: firing rate slowly goes down (see diagram in slide 18/62) Technique for describing how populations of interconnected neurons can represent patts and behavior. As result of representations being distributed over nodes, a neural network can hold many associations: same network but can make different associations. Pattern completion: recovery of the correct output pattern despite degraded input, usually possible because of heuristics. Experimenter records the activity of a single neuron in response to a stim. Microelectrode is inserted into a neuron; the firing rte of the neuron is recorded. The experimenter notes which types of stim make the neuron fire best. Neurons have preferred stim, and only respond when these stim are in their receptive field.
