Which corpuscle is sensitive to pressure?

The Pacinian corpuscle is specialized for detecting pressure and vibration. These corpuscles are located deep in the dermis and are particularly responsive to changes in pressure over time. When pressure is applied to the skin, the structure of the Pacinian corpuscle allows it to respond quickly and send signals to the nervous system, making it critical for awareness of deep pressure stimuli.

This sensitivity to pressure is specifically due to the unique onion-like structure of the Pacinian corpuscle, which is made up of multiple layers of connective tissue surrounding a nerve ending. This structure enables it to act as a deep pressure receptor, effectively responding to stronger pressure and quickly adapting to sustained pressure, allowing the perception of pulse and vibration.

In contrast, other types of corpuscles mentioned in the choices are associated with different types of sensory perceptions. Meissner corpuscles, for instance, are sensitive to light touch and changes in texture; Krause corpuscles are associated with cold sensations; and Merkel cells play a role in fine touch and the texture of objects. Thus, while they all contribute to the somatosensory system, the Pacinian corpuscle is distinctively known for its role in detecting pressure.