Question
In the context of sensory receptors responsible for transmitting the sensation of fast vibrations, which mediator is primarily involved?
| A. |
Merkel’s disc
|
| B. |
Meissner’s corpuscles
|
| C. |
Pacinian corpuscles
|
| D. |
Ruffini’s end organ
|
Show Answer
|
Correct Answer � C
Explanation
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|
Pacinian Corpuscles is the Largest Tactile receptor. Responsible for vibration detection 200 Hz or more. It is responsible for the mediation of fast vibration sense.
Pacinian corpuscles are specialized nerve endings located deep in the skin and other tissues that are specifically adapted to detect rapid vibrations and pressure changes.
Reasons for ruling out other options are-
A. Merkel’s disc: Merkel cells, or Merkel’s discs, are found in the basal layer of the epidermis and are associated with fine touch and pressure, but not specifically with fast vibrations.
B. Meissner’s corpuscles: Meissner’s corpuscles are sensitive to light touch and vibrations, but they typically respond to slower vibrations, around 10-50 Hz, which are much lower than those detected by Pacinian corpuscles.
D. Ruffini’s end organ: Ruffini endings are primarily sensitive to skin stretch and sustained pressure, playing a role in the detection of object slippage and joint angle changes, rather than vibration.
