Which receptors sense skin stretching, vibration, and limb movement?

• A. Meissner's corpuscles
• B. Ruffini and Pacinian Corpuscles
• C. Krause End Bulb
• D. Merkel Cells

Answer: (B)

Stretching, vibration, and limb movement are detected by specialized mechanoreceptors in the skin. Ruffini endings respond to skin stretch and sustained pressure, helping the brain sense changes in joint position and movement. Pacinian corpuscles respond to deep pressure and high-frequency vibration, providing information about rapid skin deformation. Because limb movement involves both stretch and vibration cues, these two types together best explain the sensation. Meissner's corpuscles detect light touch and flutter, Merkel cells detect fine touch and steady pressure, and Krause end bulbs are associated with cold thermoreception rather than mechanical movement. So the receptors that sense skin stretching, vibration, and limb movement are Ruffini endings and Pacinian corpuscles.