Variant Median and Absent Musculocutaneous Nerve

Paranjape, Vaishali; Swamy, P. Vatsala; Mudey, Abhay; Patil, D. Y.

doi:10.1080/09751270.2012.11885206

Cited by 2 publications

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“…In all cases of two lateral roots or communication, the median nerve was formed medial or anterior to axillary artery. So we observed [27]. This type of variation was described by Le Minor (1990) as Type V [10].…”

Section: Methodssupporting

confidence: 59%

Variation of Roots in the Formation of Median Nerve

Sharma¹,

Babu²,

Gupta³

2018

IJAR

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Background: Median nerve formation exhibits several variations in the form of additional roots and /or communications which are relevant to the surgical explorations of shoulder, axilla and arm.Aim: To study the variations in the formation of median nerve and its communications with musculocutaneous nerve in cadaveric upper limbs. Materials and Methods:The study was done in 34 formalin fixed cadavers (68 upper limbs) and 10 isolated limbs. All cadavers were conventionally dissected and observed for median nerve formation and dissected up to cubital fossa for presence of any communications.Observations: Out of the 78 upper limbs dissected, 12 limbs (15.38%) showed two lateral roots and one medial root contributing to the formation of median nerve. One case of bilateral presence of extra lateral root was found. The extra lateral root or communication from the musculocutaneous nerve was arising distal to coracobrachialis in 2 cases and proximal to the muscle in 10 cases. In three cases, absence of musculocutaneous nerve was observed and median nerve was supplying either all or some muscles of the flexor compartment. One of the cases of absent musculocutaneous nerve had two medial roots and one lateral root that is a very rare combination of variation not reported in the literature. In all cases of two lateral roots, the median nerve was formed medial or anterior to axillary artery. So we observed median nerve variation in 16 upper limbs [20.51%] Conclusion: Thorough understanding of variations in the formation and communications of median nerve and its vascular relations is important for successful surgical outcome and clinical interpretation of lesions of the nerve.

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Section: Methodssupporting

confidence: 59%

Variation of Roots in the Formation of Median Nerve

Sharma¹,

Babu²,

Gupta³

2018

IJAR

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“…It must be emphasized that many investigators consider as the additional lateral root of MN the connecting branch from musculocutaneous nerve to MN. The formation of MN from one lateral root and two medial roots from the medial cord of brachial plexus has been mentioned as well (15). Very rarely the MN has been found to be formed by the union of four roots.…”

Section: Discussionmentioning

confidence: 99%

Five Roots Pattern of Median Nerve Formation

Natsis

Paraskevas

Tzika

2016

Acta Med. (Hradec Kralove, Czech Repub.)

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An unusual combination of median nerve's variations has been encountered in a male cadaver during routine educational dissection. In particular, the median nerve was formed by five roots; three roots originated from the lateral cord of the brachial plexus joined individually the median nerve's medial root. The latter (fourth) root was united with the lateral (fifth) root of the median nerve forming the median nerve distally in the upper arm and not the axilla as usually. In addition, the median nerve was situated medial to the brachial artery. We review comprehensively the relevant variants, their embryologic development and their potential clinical applications.

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Variant Median and Absent Musculocutaneous Nerve

Cited by 2 publications

References 0 publications

Variation of Roots in the Formation of Median Nerve

Variation of Roots in the Formation of Median Nerve

Five Roots Pattern of Median Nerve Formation

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