Function of the ramus communicans of the medial and lateral palmar nerves of the horse

Equine Veterinary Journal
J SchumacherR Wilhite

Abstract

The role of the communicating branch between the medial and lateral palmar nerves of horses (i.e. the ramus communicans) in conveying sensory impulses proximally should be determined to avoid errors in interpreting diagnostic anaesthesia of the palmar nerves. Sensory nerve fibres in the ramus communicans of horses pass proximally from the lateral palmar nerve to merge with the medial palmar nerve, but not vice versa. To determine the direction of sensory impulses through the ramus communicans between lateral and medial palmar nerves. Pain in a thoracic foot was created with set-screw pressure applied to either the medial or lateral aspect of the sole of each forelimb of 6 horses. The palmar nerve on the side of the sole in which pain was created was anaesthetised proximal to the ramus communicans with local anaesthetic. Lameness was evaluated objectively by using a wireless, inertial, sensor-based, motion analysis system (Lameness Locator). Lameness was also evaluated subjectively by using a graded scoring system. Local anaesthetic was then administered adjacent to the ramus communicans to determine the effect of anaesthesia of the ramus communicans on residual lameness. When pain originated from the medial or the lateral aspec...Continue Reading

References

Jul 1, 1984·In Practice·S Dyson
Nov 1, 1993·Equine Veterinary Journal·I M Wright
May 15, 1998·Journal of Animal Science·R C LittellC B Ammerman
Jun 22, 2000·Statistics in Medicine·R C LittellR Natarajan
Sep 2, 2011·American Journal of Veterinary Research·Kevin G KeeganShannon K Reed

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Citations

Nov 20, 2016·Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society·Matthew J AllenBrigitte von Rechenberg
Feb 19, 2020·Journal of the American Veterinary Medical Association·Shannon K ReedKevin G Keegan
Jun 14, 2021·Journal of Equine Veterinary Science·Maureen E KelleherNathaniel A White

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