Journal of Postgraduate Medicine
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Year : 1993  |  Volume : 39  |  Issue : 1  |  Page : 14-6

Occasional head of flexor pollicis longus muscle: a study of its morphology and clinical significance.

Dept of Anatomy, TN Medical College, Bombay Central, Maharashtra.

Correspondence Address:
M V Hemmady
Dept of Anatomy, TN Medical College, Bombay Central, Maharashtra.

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Source of Support: None, Conflict of Interest: None

PMID: 0008295137

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A cadaveric dissection study of 54 upper extremities to determine the incidence of occurrence, morphology and relations of the occasional head of the flexor pollicis longus muscle is presented. The occasional head of the flexor pollicis longus muscle was found to be present more frequently (66.66%) than absent. It mainly arose from the medical epicondyle of the humerus (55.55%) and the medial border of the coronoid process of the ulna (16.66%). It was found to be in close association with the median nerve (anteriorly) and the anterior interosseous nerve (posteriorly). The clinical implications of these findings are discussed viz. entrapment neuropathies of the median and anterior interosseous nerves, cicatricial contraction of the occasional head leading to flexion deformity of the thumb and the likely necessity to lengthen/release the occasional head in spastic paralysis of the flexor pollicis longus muscle.


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Online since 12th February '04
2004 - Journal of Postgraduate Medicine
Official Publication of the Staff Society of the Seth GS Medical College and KEM Hospital, Mumbai, India
Published by Wolters Kluwer - Medknow