PSYC 2390 Lecture Notes - Retinitis Pigmentosa, Brainstem

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Selective adaptation neurons fire for long become fatigued or adapt causing fire rate to decrease and neurons to fire less when immediately presented again, only select neurons, specifically ones stimulated adapt, psychophysical selective adaptation experiment to test physiological theory, including grating stimulus and constant threshold as a measurement, so the mehod is measure constant thereshold at a number of orientations of contrast necessary to see grating, adapt to high contrast grating of vertical and remeasure, sure enough only the vertical is effected, the graph is similar to orientation tuning curve, which implies the relationship between perception and orientation detectors cats selectively reared in environment with vertical , neural plasticity/experience dependent plasticity wont take place wont register horizantel bars, again demonstrating the importance of feature detectors in perception there is a retinotopic map on the visual cortex as well, additionally, cortical magnification factor fovea 10% of cortex, .

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