Accessory Abductor Digiti Minimi Muscle Originating Proximal to the Wrist Causing Symptomatic Ulnar Nerve Compression

R, Luethke; Dellon, A. Lee

doi:10.1097/00000637-199203000-00022

Cited by 15 publications

(12 citation statements)

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“…This was also the case in the reports of Luethke and Dellon (1992) and Netscher and Cohen (1997). From an MRI report on the normal anatomy of Guyon's canal (Zeiss et al, 1992) and other clinical reports (Turner and Caird, 1977;Netscher and Cohen, 1997), it is apparent that there are usually precipitating factors for an individual with an anomalous muscle in Guyon's canal to develop ulnar nerve compression syndrome.…”

Section: Discussionmentioning

confidence: 61%

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Anomalous flexor digiti minimi brevis in Guyon's canal

Madhavi

Holla

2003

Clinical Anatomy

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In an adult male cadaver, the flexor digiti minimi brevis, a muscle of the hypothenar eminence, was found to arise from the superficial transverse septum (between the superficially placed flexor carpi ulnaris, palmaris longus, and flexor carpi radialis muscles, and the deeply placed flexor digitorum superficialis muscle) in the distal fourth of the flexor aspect of the left forearm. The muscle exhibited two strata of muscle fibers at its origin. The superficial stratum was a thin layer of transversely running fibers confined to the forearm, which has not been previously reported. The deep stratum, a thick layer of longitudinally running fibers, formed the bulk of the muscle. It traversed Guyon's canal superficial to the ulnar nerve and vessels to reach the hypothenar eminence. Its course through Guyon's canal could be a cause for ulnar tunnel syndrome. The ulnar nerve trunk innervated not only the anomalous flexor digiti minimi brevis muscle, but also abductor digiti minimi and palmaris brevis. This may be due to the common phylogeny of these three muscles from the same muscle mass.

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Section: Discussionmentioning

confidence: 61%

“…An anomalous muscle in Guyon's canal is considered to be one of the causes of ulnar tunnel syndrome (Sälgeback, 1977;Turner and Caird, 1977;Luethke and Dellon, 1992;Netscher and Cohen, 1997). The presence of a muscle belly in the canal has also been implicated as a contributory factor in ulnar artery thrombosis (Pribyl and Moneim, 1994).…”

Section: Introductionmentioning

confidence: 99%

Anomalous flexor digiti minimi brevis in Guyon's canal

Madhavi

Holla

2003

Clinical Anatomy

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“…Nonhypertrophied anomalous muscle bands that crossed the ulnar nerve were also found to cause compressive neuropathy around the wrist [16,22]. It has been suggested that these anomalous muscle bands found in cadavers could compress the ulnar nerve in vivo [7,12].…”

Section: Discussionmentioning

confidence: 99%

Separate muscle bundles of the flexor digitorum superficialis overlying the ulnar nerve

et al. 2015

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“…The ADM is frequently composed of two muscular beams (Santo Neto et al, 1984;Murata et al, 2004;Gusmao et al, 2005). Furthermore, absences, duplications, fusions with neighboring muscles, and accessory heads of ADM are reported in literature (Sheppard et al, 1991;Luethke and Dellon, 1992;Sanudo et al, 1993;Wahba et al, 1998;Soldado-Carrera et al, 2000;Al-Qattan, 2004). Perkins and Hast (1993) found extra slips of origin of the ADM in 10 percent of hands they evaluated.…”

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confidence: 97%