Are narrow-diameter, unmyelinated sensory nerve fibers that transmit signals from pleasant touch. A. P tactile efferents B. C tactile efferents C. P tactile afferents D. PT nerves E. C tactile afferents

Option E, C tactile (CT) afferent

Explanation:

Whenever a slow moving gentle touch experienced, the response is due to the nerve fibers called C-Tactile afferents (CTs).  

C-Tactile afferents (CTs) are unmyelinated mechanoreceptors  of low threshold and low conduction velocities.  

In humans, CT neurons are found in hairy skin.  

The pleasant feeling observed during a slow gentle touch is due to the interaction of  

CT neurons project to the insular cortex in the brain

Hence, option E is correct

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