PSYC 2220 Lecture 2: Psyc 2220 - Ch 2 - Lecture 2.6
28 Sep 2017
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Document Summary
Sensory receptors - specialized neurons that respond to specific kinds of energy. Making connections with many millions of neurons. Small electrodes are used to record from single neurons. Recording in electrode is inside the nerve fiber. Difference in charge between them in -70mv. On the top you have the resting stage. Stimulus, a push on the touch on the sensitive receptor, then we can look at the. B- red - the nerve impulse - the potential within the nerve fiber, to increase - instead of electrical activity in the nerve fiber the differential of -70, now we have a +40. Remain the same size regardless of stimulus intensity - no matter how intense the stimulus is. it doesn"t increase in intensity do you increase the intensity of the stimulus. Increase in rate to increase in stimulus intensity. Have a refractory period of 1ms - upper firing rate is 500 to 800 impulses per.
