Aman falls into a deep sleep with one arm under his head This arm is paralyzed when he awakens, but it tingles, and pain sensation in it is still intact. The reason for the loss of motor function without loss of pain sensation is that in the nerves to his arm a. sensory nerves are nearer the bone than motor nerves and hence are less affected by pressure b. A fibers are more sensitive to pressure than C fibers c. Cfibers are more sensitive to pressure than A fibers d. motor nerves are more affected by sleep than sensory nerves e. A fibers are more susceptible to hypoxia than B fibers

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Aman falls into a deep sleep with one arm under his head This arm is paralyzed when he awakens, but it tingles, and pain sensation in it is still intact. The reason for the loss of motor function without loss of pain sensation is that in the nerves to his arm a. sensory nerves are nearer the bone than motor nerves and hence are less affected by pressure b. A fibers are more sensitive to pressure than C fibers c. Cfibers are more sensitive to pressure than A fibers d. motor nerves are more affected by sleep than sensory nerves e. A fibers are more susceptible to hypoxia than B fibers

Answer 1

The correct answer is c. C fibers are more sensitive to pressure than A fibers.When Aman falls into a deep sleep with one arm under his head, the compression of the arm can lead to nerve damage. The sensory nerves, which are responsible for transmitting pain and other sensations, are more susceptible to compression and damage than the motor nerves, which control muscle movement.C fibers are unmyelinated and have a slower conduction velocity compared to A fibers, which are myelinated and have a faster conduction velocity. C fibers are more sensitive to pressure and can be damaged more easily than A fibers. Therefore, the tingling and pain sensation in Aman's paralyzed arm indicate that the sensory nerves (C fibers) are more affected by the compression, while the motor nerves (A fibers) are less affected.The other options are incorrect:a. The proximity of sensory nerves to the bone is not the primary reason for the loss of motor function without loss of pain sensation.b. A fibers are not more sensitive to pressure than C fibers.d. There is no evidence to suggest that motor nerves are more affected by sleep than sensory nerves.e. A fibers are not more susceptible to hypoxia than B fibers.

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