Variations in the Course of the Thenar Motor Branch of the Median Nerve

1996 ◽  
Vol 21 (3) ◽  
pp. 344-346 ◽  
Author(s):  
P. J. Hurwitz
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Prospective Study ◽  
Median Nerve ◽  
Carpal Tunnel ◽  
Large Series ◽  
Anomalous Origin ◽  
Motor Branch ◽  
Tunnel Syndrome ◽  
A Prospective Study ◽  
Additional Anomaly

In a prospective study of 80 operations in 61 patients for carpal tunnel syndrome, special attention was given to the course of the thenar motor branch and its variations. An anomalous origin of the branch was found in 21%. Multiple motor branches occurred in 12.5%. Seventeen patients had operations on both hands, but anomalies were often found in one side only. Special attention is drawn to an additional anomaly where the motor branch lies superficially to the retinaculum buried in a hypertrophic preligamentous muscle. If this anomaly is not borne in mind, the nerve can easily be injured during splitting of the flexor retinaculum. We found this variation in 9% of our patients, but it is rarely mentioned in the literature and in many large series it is not described at all.

Hand-held nerve conduction device in carpal tunnel syndrome: A prospective study

2012 ◽  
Vol 45 (5) ◽  
pp. 635-641
Author(s):  
S. Veronica Tan ◽  
Fiona Sandford ◽  
Mark Stevenson ◽  
Sara Probert ◽  
Sue Sanders ◽  
...  
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Prospective Study ◽  
Carpal Tunnel ◽  
Nerve Conduction ◽  
Tunnel Syndrome ◽  
A Prospective Study

scholarly journals Diagnostic value of sonography in patients with suspected carpal tunnel syndrome: A prospective study

2005 ◽  
Vol 52 (1) ◽  
pp. 304-311 ◽  
Author(s):  
Hans-Rudolf Ziswiler ◽  
Stephan Reichenbach ◽  
Esther Vögelin ◽  
Lucas M. Bachmann ◽  
Peter M. Villiger ◽  
...  
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Prospective Study ◽  
Carpal Tunnel ◽  
Diagnostic Value ◽  
Tunnel Syndrome ◽  
A Prospective Study

scholarly journals Median Nerve Variation: A Complete Spin before Terminal Branching

2020 ◽  
Vol 15 (01) ◽  
pp. e1-e4
Author(s):  
Amgad S. Hanna ◽  
Zhikui Wei ◽  
Barbara A. Hanna
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Median Nerve ◽  
Carpal Tunnel ◽  
Distal Forearm ◽  
Flexor Digitorum Superficialis ◽  
Anatomical Variant ◽  
Motor Branch ◽  
Surgical Interventions ◽  
Tunnel Syndrome ◽  
Flexor Digitorum

AbstractMedian nerve anatomy is of great interest to clinicians and scientists given the importance of this nerve and its association with diseases. A rare anatomical variant of the median nerve in the distal forearm and wrist was discovered during a cadaveric dissection. The median nerve was deep to the flexor digitorum superficialis (FDS) in the carpal tunnel. It underwent a 360-degree spin before emerging at the lateral edge of FDS. The recurrent motor branch moved from medial to lateral on the deep surface of the median nerve, as it approached the distal carpal tunnel. This variant doesn't fall into any of Lanz's four groups of median nerve anomalies. We propose a fifth group that involves variations in the course of the median nerve. This report underscores the importance of recognizing variants of the median nerve anatomy in the forearm and wrist during surgical interventions, such as for carpal tunnel syndrome.

No correlation between sonographic and electrophysiological parameters in carpal tunnel syndrome

2013 ◽  
Vol 39 (2) ◽  
pp. 161-166 ◽  
Author(s):  
A. Żyluk ◽  
I. Walaszek ◽  
Z. Szlosser
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Prospective Study ◽  
Carpal Tunnel ◽  
Sectional Area ◽  
Cross Sectional ◽  
Conduction Disturbances ◽  
Tunnel Syndrome ◽  
The Mean ◽  
Electrophysiological Examination ◽  
A Prospective Study

A prospective study was carried out to investigate any correlation between electrophysiological and sonographic findings in patients with a clinical diagnosis of carpal tunnel syndrome. A total of 113 patients (113 wrists) in 90 women and 23 men, with a mean age of 60 years, underwent sonographic and electrophysiological examination. Fifty-five patients (48%) had mild, 43 (38%) moderate and 12 (11%) had severe conduction disturbances and three patients had normal conduction. Sonographic measurements showed a cross-sectional area of the median nerve of 9.9 mm2 at the forearm and 17.8 mm2 at the tunnel inlet. The mean anteroposterior diameter (height) of the nerve at the tunnel inlet was 2.7 mm, and the lowest height inside the tunnel was 1.8 mm. No correlation was found between sonographic and electrophysiological parameters.

Carpal Tunnel Syndrome in Pregnancy: A Prospective Study

1987 ◽  
Vol 66 (3) ◽  
pp. 233-235 ◽  
Author(s):  
Gunvor Ekman-Ordeberg ◽  
Stig Salgeback ◽  
Gunnar Ordeberg
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Prospective Study ◽  
Carpal Tunnel ◽  
Tunnel Syndrome ◽  
A Prospective Study ◽  
In Pregnancy

The Anatomical Site of Constriction of the Median Nerve in Patients with Severe Idiopathic Carpal Tunnel Syndrome

2006 ◽  
Vol 31 (6) ◽  
pp. 608-610 ◽  
Author(s):  
M. M AL-QATTAN
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Median Nerve ◽  
Carpal Tunnel ◽  
Carpal Tunnel Release ◽  
Anatomical Site ◽  
Idiopathic Carpal Tunnel Syndrome ◽  
Tunnel Syndrome ◽  
A Prospective Study ◽  
Open Carpal Tunnel Release ◽  
Radiological Studies

During open carpal tunnel release in patients with severe idiopathic carpal tunnel syndrome, an area of constriction in the substance of the median nerve is frequently noted. In a prospective study of 30 patients, the central point of the constricted part of the nerve was determined intraoperatively and found to be, on average, 2.5 (range 2.2–2.8) cm from the distal wrist crease. This point always corresponded to the location of the hook of the hamate bone. These intraoperative findings were compared with the “narrowest” point of the carpal canal as determined by anatomical and radiological studies in the literature.

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