VM8054 Veterinary Histology

Example: Lamellar Corpuscle

Author: Dr. Thomas Caceci
Here's a group of several lamellar corpuscles (PC) in the deep regions of a footpad from a cat. These are frequently called by the older eponym, Pacinian corpuscles, derived from their discoverer, Filipo Pacini.

Lamellar corpuscles function mainly as pressure receptors in locations like this. A very elongated one is present in this field. That's a little unusual; most of them will be quite round, as the others are in this field.



Up close the details of the structure of the lamellated corpuscle are more obvious. The small opening at dead center is the location of the nerve fiber (NF). In this image it's running in and out of the plane of the section, towards you.

The lamellated layers around it (just like the layers of an onion) can slide past each other under pressure and cause the nerve to fire. Lamellated corpuscles are also found in some of the abdominal viscera (notably the pancreas) where they function to detect vibration and possibly very low frequency sounds. That fluttering in your gut you feel when the stereo's "bass" control is cranked all the way up is actually the response of these receptors to low frequency sound and heavy air movement.

Cat footpad; H&E stain, 1.5 µm plastic section, 40x and 200x

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