Illustrated Encyclopedia of Human Anatomic Variation: Opus I: Muscular System, Alphabetical Listing of Muscles, Palmaris Longus
Ronald A. Bergman, PhD
Adel K. Afifi, MD, MS
Ryosuke Miyauchi, MD
Peer Review Status: Internally Peer Reviewed
Two examples of musculus comitans nervi mediani (m. palmaris profundus) In the upper diagram the muscle belly is proximal and in the lower the diagram the muscle belly is distally located. The median nerve and the anomalous muscles are contained in a common fascial sheath. In the diagrams, the sheath is not seen at the two ends of the illustration. In both cases, parts of the muscle enter the carpal canal, i.e. either the distal tendon or the distal muscle belly or its tendon. A and C show a cut line through the proximal part of the sheath depicting the relationship of muscle and nerve. In B and D, the cut line shows the muscle and nerve, distially, in the carpal canal. It is a B an D that the unyielding transverse carpal ligament may compress and functionally alter the median nerve. The lowest placed illustration is of the carpal canal. MN: median nerve, PP (CNM): muscle belly, T: tendon of muscle.
From Sahinoglu, Cassell, Miyauchi, and Bergman, 1994
Please send us comments by filling out our Comment Form.
All contents copyright © 1995-2024 the Author(s) and Michael P. D'Alessandro, M.D. All rights reserved.
"Anatomy Atlases", the Anatomy Atlases logo, and "A digital library of anatomy information" are all Trademarks of Michael P. D'Alessandro, M.D.
Anatomy Atlases is funded in whole by Michael P. D'Alessandro, M.D. Advertising is not accepted.
Your personal information remains confidential and is not sold, leased, or given to any third party be they reliable or not.
The information contained in Anatomy Atlases is not a substitute for the medical care and advice of your physician. There may be variations in treatment that your physician may recommend based on individual facts and circumstances.
URL: http://www.anatomyatlases.org/