PGY 300 Lecture Notes - Lecture 7: Rhodopsin, Basilar Membrane, Tectorial Membrane
16 Feb 2017
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Document Summary
Look at one sensory nerve cell and ask how much of the outside world is it signaling to you its receptive field. Primary sensory neurons converge on one secondary sensory neuron secondary sensory neuron has large receptive field. Combines all the receptive fields of all the primary sensory neurons. If circuit is largely convergent, you have a system very sensitive to stimuli summation of signals. Can"t tell which two areas are being stimulated if they"re very close. If not convergent, you can easily tell where stimulus is coming from, even in a small area. When you press pin on your skin, the area your skin depresses is larger that the area the pin is stimulating. Neurons just off from the actual area pin is stimulating do sense the deformation but isn"t experiencing the stimulus from the pin full on (less stimulus) Neuron most stimulated will most strongly inhibit its neighbors. Phasic response: respond very briefly to stimulus.
