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Physiology Nervous System a30258d2

If a single spinal nerve is cut, the area of tactile loss is always greater than the area of loss of painful sensation, because

A
Tactile information is carried by myelinated fast conduction fiber
B
Tactile receptors adapt quickly
C
Degree of overlap of fibers carrying tactile sensation is much less
D
In the primary sensory cortex tactile sensation is represented on a larger area
High-Yield Explanation
Ans. (c) Degree of overlap of fiber carrying tactile sensation is much less(Ref: Ganong, 25th ed/p.160)The degree of overlap of fibers carrying pain is much greater than tactile sensationSo, the area of tactile loss is always greater for tactile sensation

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