Vibratory sensation depends on the detection of rapidly changing, repetitive sensations. The high-frequency end of the repetitive stimulation scale is detected by which structure?
**Core Concept**
Vibratory sensation is a type of tactile perception that involves the detection of rapidly changing, repetitive sensations. This is mediated by the nervous system through specific sensory receptors and pathways.
**Why the Correct Answer is Right**
The detection of high-frequency repetitive stimulation is primarily mediated by the **Meissner's corpuscles**. These sensory receptors are sensitive to low-frequency vibrations and are responsible for detecting changes in texture and vibrations. Meissner's corpuscles are found in the dermal papillae of the skin and are involved in the transmission of vibratory sensations to the central nervous system.
**Why Each Wrong Option is Incorrect**
**Option B:** Pacinian corpuscles are involved in the detection of high-frequency vibrations, but they are more sensitive to pressure and acceleration than Meissner's corpuscles. They are also found deeper in the dermal layer, making them less responsive to surface stimuli.
**Option C:** Ruffini's corpuscles are responsible for detecting stretch and skin tension, rather than vibratory sensations. They are often involved in the perception of shape and texture.
**Option D:** Hair follicle receptors are involved in the detection of movement and pressure, but they are not primarily responsible for detecting vibratory sensations.
**Clinical Pearl / High-Yield Fact**
Meissner's corpuscles are responsible for the detection of fine textures and vibrations, and their dysfunction can lead to impaired tactile perception, as seen in conditions such as peripheral neuropathy.
**Correct Answer:** C. Pacinian corpuscles.