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Biological: Behavioural genetics · Evolutionary psychology · Neuroanatomy · Neurochemistry · Neuroendocrinology · Neuroscience · Psychoneuroimmunology · Physiological Psychology · Psychopharmacology (Index, Outline)
| Ruffini ending | ||
|---|---|---|
| Nerve ending of Ruffini. | ||
| Latin | corpusculum sensorium fusiforme | |
| Gray's | subject #233 1061 | |
| System | ||
| MeSH | [1] | |
| [[Image:|190px|center|]] | ||
The Bulbous corpuscle or Ruffini ending or Ruffini corpuscle is a slowly adapting mechanoreceptor found in the subcutaneous tissue of humans. It is named after Angelo Ruffini.
Structure[]
Ruffini corpuscles are enlarged dendritic endings with elongated capsules.[1]
Ruffini corpuscle from original slide sent by Ruffini to Sir Charles Sherrington[2]
Function[]
This spindle-shaped receptor is sensitive to skin stretch, and contributes to the kinesthetic sense of and control of finger position and movement.[3] It is believed to be useful for monitoring slippage of objects along the surface of the skin, allowing modulation of grip on an object.
Ruffini corpuscles respond to sustained pressure[1] and show very little adaptation.[4]
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 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.[5]
Footnotes and references[]
- ↑ 1.0 1.1 "8" Ganong's Review of Medical Physiology, 23rd, TATA McGraw-Hill Lange. URL accessed 9 June 2012. Cite error: Invalid
<ref>tag; name "Ganong" defined multiple times with different content - ↑ Molnár Z, Brown RE., 2010. Insights into the life and work of Sir Charles Sherrington. Nat Rev Neurosci. 11(6):429-36
- ↑ Mountcastle, Vernon C. (2005). The Sensory Hand: Neural Mechanisms of Somatic Sensation, Harvard University Press.
- ↑ Arthur c. Guyton; John E. Hall. "47" Guyton & Hall Pocket Companion to Textbook of Medical Physiology, 10. URL accessed 9 June 2012.
- ↑ Hamilton, Nancy (2008). Kinesiology: Scientific Basis of Human Motion, 76–7, McGraw-Hill.
External links[]
- Paré M, Behets C, Cornu O (2003). Paucity of presumptive ruffini corpuscles in the index finger pad of humans.. J Comp Neurol 456 (3): 260–6.
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