PNB 3700 Chapter Notes -Reductio Ad Absurdum, Auditory Cortex, Tonotopy
Document Summary
Classification of receptors based on whether the sensory ending looks inward (@ internal environment) or outward (@ external environment) s. Relationship between the subjectively- experienced threshold stimulus and suprathreshold stimuli. These maps are defined as 1) somatotopic, 2) retinotopic and 3) tonotopic respectively. In all cases, those parts of the sensory surface which are of greatest biological importance, where greatest discrimination of the sensory input is. Sensory nerve endings are generally sensitive to stimulation of a small patch of the surroundings. s. In those parts of the sensory surface where it is impor-tant that any stimulus should be precisely localized, the rfs are small. Vice versa, where localization is not so important, rfs tend to be large. This was well shown by the classic two-point threshold experiments of weber. These specific features of the sensory world, features which as the preceding examples indicate are all of great significance in the animal"s life, are known as trigger stimuli.
