38D. The PA decided to test BN\'s ability to respond to sensory stimuli. If sens

Question

38D.

The PA decided to test BN's ability to respond to sensory stimuli. If sensation is normal, she expects his two-point discrimination threshold to be smaller in his fingertips than on his shoulder because:

a. neurons in the fingertips have fewer branches and smaller receptive fields

b. neurons in the fingertips have more branches and larger receptive fields

c. neurons in the fingertips have more branches and smaller receptive fields

d. neurons in the fingertips have fewer branches and larger receptive fields

Explanation / Answer

answer is c.

neurons in the fingertips have more branches and smaller receptive fields

normally many nerve branches in fingers with small receptive fields to distinguish touch. Back has fewer branches with larger receptive fields.

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