Summary
During dissection an anomalous muscle was found on the medial aspect in the distal half of one left upper extremity. This muscle arose from the humerus between the m. coracobrachialis and the m. brachialis, passed obliquely across the front of the brachial artery and median nerve and blended with the common origin of the forearm flexor muscles. It does not appear to be an additional head of the biceps brachii or the brachialis muscles. The existance of this anomalous muscle should be kept in mind in a patient presenting with a high median nerve palsy together with symptoms of brachial artery compression.
Résumé
Au cours d'une dissection, un muscle anormal a été trouvé sur la face médiale de la moitié distale d'un membre supérieur gauche. Ce muscle naissait de l'humérus entre les mm. coraco-brachial et brachial, passait obliquement en avant de l'a. brachiale et du n. médian et fusionnait avec l'origine commune des muscles fléchisseurs de l'avant-bras. Il ne s'agissait pas d'un chef supplémentaire du m. biceps brachial ou du m. brachial. L'existence de ce muscle anormal doit être évoquée chez un patient présentant à la fois une paralysie haute du n. médian et des symptômes de compression de l'a. brachiale.
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References
Bergman RA, Thompson SA, Afifi AK (1984) Catalog of human variation. Urban and Schwarzenberg, Baltimore, pp 27–31
Calori L (1866) Delle corrispondenze del nervo musculo-cutaneo con il capo soprannumerario del bicipite bracchiale e col bracchiale interno. Mem Accad Scienze Instituto Bologna S 2, VI: 149–155
Cihak R (1972) Ontogenesis of the skeleton and intrinsic muscles of the human hand and foot. Adv Anat Embryol Cell Biol 46: 1–194
Greig HW, Anson BJ, Budinger JM (1952) Variations in the form and attachments of the biceps brachii muscle. Quart Bull NW Univ M School 26: 241–250
Grim M (1972) Ultrastructure of the ulnar portion of the contrahent muscle layer in the embryonic human hand. Folia Morphol (Praha) 20: 113–115
Gruber W (1872) Sur un muscle biceps humeral ayant une portion coracoidienne et une portion humeral anomale a la place de la portion glenoidienne. Bull Acad Imp Sci St Petersbourg 17: 314–318
Hamilton WJ, Mossman HW (1972) Hamilton, Boyd, Mossman's human embryology, 4th edn. Macmillan, London and Basingstoke, pp 557–559
Haymaker W, Woodhall B (1953) Peripheral nerve injuries, 2nd edn. Saunders, Philadelphia
Hollinshead HW (1982) Anatomy for surgeons, vol 3, 3rd edn. Harper and Row, Philadelphia, p 354
Le Double AF (1897) Traite des variations du systeme musculaire des l'homme et leur signification au point de vue de l'anthropologie zoologique. Schleicher, Paris
Macalister A (1875) Observations on muscular anomalies in the human anatomy. Trans Roy Irish Acad Sci XXV: 1–130
Machleder HI (1983) Vascular disorder-sof the upper extremity. Futura, New York, p 25
O'rahilly R (1986) Gardner, Gray, O'Rahilly anatomy, 5th edn. Saunders, Philadelphia, p 114
Schaefer EA, Symington J, Bryce TH (eds.) (1915) Quain's anatomy. Longmans, Green and Co, London
Struthers J (1848) On a peculiarity of the humerus and humeral artery. Monthly Journal of Medical Science, October 1848, p 264
Testut L (1884) Les anomalies musculaires chez l'homme. Masson, Paris, pp 370–406
Warwick R, Williams PL (1980) Gray's anatomy, 35th edn. Churchill Livingstone, Edinborough Melbourne London New York, p 572
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Dharap, A. An anomalous muscle in the distal half of the arm. Surg Radiol Anat 16, 97–99 (1994). https://doi.org/10.1007/BF01627930
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DOI: https://doi.org/10.1007/BF01627930