Glomerular nerve endings in corial papillae of the pig lip skin.
In the tops of corial papillae of the pig lip skin the authors sometimes observed besides typical sensory corpuscles also glomerular nerve endings. They are formed by one axon or they are polyaxon. The nerve fibres are richly branched in the formation. In electronogrammes a large number of axons is visible in cross sections round some of which there are more or less formed lamellous systems up to four lamellae. Between the axons there are nuclei of Schwann cells, on the surface there is a thin capsule of fibrocyte character. In non-primate mammals the typical receptor in the corium of the skin are simple corpuscles, in primates glomerular nerve endings. As concerns sensory corpuscles it is the other way round. The authors are of the opinion that the observed glomerular endings represent morphologically a transitory formation. With respect to the occurrence of lamellous complexes in the glomeruli, they can be considered as equivalent to simple sensory corpuscles with rapid adaptation.
D000818:Animals; D001369:Axons / Q000648:ultrastructure; D008046:Lip / Q000294:innervation*; D008465:Mechanoreceptors / Q000033:anatomy & histology*; D008854:Microscopy, Electron; D009411:Nerve Endings / Q000033:anatomy & histology*; D009475:Neurons, Afferent / Q000648:ultrastructure; D012867:Skin / Q000294:innervation*; D013552:Swine