MEDICAL PHYSIOLOGY

PHYSIOLOGY

CENTRAL NERVOUS SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which one of the following is a sensory receptor sensitive to deep pressure:
A
Pancinian Corpuscles
B
Meissner’s Corpuscles
C
Muscle Spindles
D
Naked Nerve Endings
Explanation: 

Detailed explanation-1: -Pacinian corpuscles, also known as Vater-Pacini or lamellar corpuscles, are sensory receptors for vibration and deep pressure and are essential for proprioception [1]. They can be found throughout the whole body; however, it is the hands and feet where they occur most numerously and tightly grouped.

Detailed explanation-2: -Pacinian corpuscles are highly sensitive mechanoreceptors which respond only to rapid mechanical changes. They are particularly responsive to vibration and appear to subserve the type of sensibility known as vibration sense in man.

Detailed explanation-3: -Pacinian corpuscles (seen in Figure 17.7) are located deep in the dermis of both glabrous and hairy skin and are structurally similar to Meissner’s corpuscles; they are found in the bone periosteum, joint capsules, pancreas and other viscera, breast, and genitals.

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