The Bulbous corpuscle or Ruffini ending or Ruffini corpuscle is a slowly adapting

mechanoreceptor A mechanoreceptor, also called mechanoceptor, is a sensory receptor that responds to mechanical pressure or distortion. Mechanoreceptors are innervated by sensory neurons that convert mechanical pressure into electrical signals that, in animals ...

located in the cutaneous tissue between the dermal papillae and the hypodermis. It is named after Angelo Ruffini.

Structure

Ruffini corpuscles are enlarged dendritic endings with elongated capsules. Ruffini Corpuscle by Angelo Ruffini

Function

This spindle-shaped receptor is sensitive to skin stretch, and contributes to the kinesthetic sense of and control of finger position and movement. They are at the highest density around the fingernails where they act in monitoring slippage of objects along the surface of the skin, allowing modulation of grip on an object. Ruffini corpuscles respond to sustained pressure and show very little adaptation. Ruffinian endings are located in the deep layers of the skin, and register mechanical deformation within joints, more specifically angle change, with a specificity of up to 2.75 degrees, as well as continuous pressure states. They also act as thermoreceptors that respond for a long time, so in case of deep burn there will be no pain, as these receptors will be burned off.

References

External links

* {{Authority control Sensory receptors