Cadaveric Study of Anatomical Variations in the Musculocutaneous Nerve and in the Median Nerve

Priya, Abhilasha; Gupta, Chandni; D’Souza, Antony Sylvan

doi:10.1055/s-0039-1688799

Cited by 7 publications

(6 citation statements)

References 8 publications

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“…However, at times the subclavian-axillary stem is derived from the sixth or eighth segmental arteries establishing an abnormal relation about the cords of the brachial plexus [ 5 ]. As presented in Table 2 , our findings were similar to other North Indian studies [ 2 , 6 ]. However, a strikingly higher incidence was observed in Central Indian, Malaysia, Nepal populations, and lower incidence in Iranian and Sri Lankan populations [ 7 - 11 ].…”

Section: Discussionsupporting

confidence: 91%

Variations of Median Nerve Formation in North Indian Population

Passey¹,

Rabbani²,

Razdan³

et al. 2022

Cureus

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Introduction: The median nerve is usually formed by two roots contributed from the medial and lateral cords of the brachial plexus. Morphological variations of the median nerve can have clinical implications from the anesthetic and surgical points of view. In this cadaveric observation study, we report the variations of median nerve formation in the North Indian population. Methods: We observed the formation of the median nerve in 40 human cadaveric upper limb specimens. The specimens belonged to 20 right and 20 left upper limbs. Variations in the formation of the median nerve were noted.Results: Of the 40 dissected specimens, six (15%) had triple roots including a supernumerary root contributing to the medial nerve formation. The supernumerary root was a branch of the lateral cord in five cases, and it had an additional contribution from the medial cord in one case. The median nerve formation and continuation were located anterior or laterally in 39 specimens (97.5%) and medial in one (2.5%) in relation to the axillary artery. Conclusion:We observed supernumerary roots of varying morphology contributing to the median nerve formation. These variations should be considered during the administration of regional anesthesia and during the management of brachial plexus injuries. Further large multi-region studies will help in a better understanding of these variations.

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Section: Discussionsupporting

confidence: 91%

Variations of Median Nerve Formation in North Indian Population

Passey¹,

Rabbani²,

Razdan³

et al. 2022

Cureus

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“…A branch of the median nerve was continued as a lateral cutaneous nerve of the forearm. According to this study, this was comparable to the right upper extremity case (10).…”

Section: Discussionsupporting

confidence: 80%

Absence of the Musculocutaneous Nerve; Two Case Reports and Literature Review

Abdelmotalab

2024

Al-Kindy Col. Med. J

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The musculocutaneous nerve is important in the upper extremity because it provides motor innervation to the musculature of the anterior arm region and sensory innervation to the skin on the lateral side of the forearm region. During the dissection of approximately 74 aged male cadaver for the 2021-2022 academic year at the Department of Anatomy, Faculty of Medicine, International University of Africa, Sudan. Considerable variation was present; the musculocutaneous nerve was observed to be absent in both upper extremities. The median nerve replaces the musculocutaneous nerve innervation’s role on both sides except for the coracobrachialis muscle on the right side. A direct branch from the lateral cord innervated it. Reporting these variations has a critical impact on many surgical and clinical procedures.

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“…Similar to our study Priya et al, reported the communication in 8 cases out of 60 (13.3%). Their study showed 5 communications on the left side and 3 on the right side 4. Studies done by Beheiry et al, Chitra et al, Joshi et al, Budhiraja et al, Dahiphale et al, Balachandra et al,…”

mentioning

confidence: 86%

Bilateral cadaveric variations of musculocutaneous nerve and median nerve in the anterior brachium: a case report

Periyasamy,

Kishore,

Ramachandra

2024

Int J Res Med Sci

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Formation of the brachial plexus is by the union of ventral rami of C5-T1 spinal nerves. The musculocutaneous nerve is a continuation of the lateral cord, pierces the coracobrachialis and supplies the flexor compartment of the arm. Our case report presents a unique bilateral cadaveric variation in the musculocutaneous nerve and median nerve branching patterns, in the flexor compartment of the arm. A case report of bilateral variations of musculocutaneous nerve and median nerve (R-Right, L-Left) was found during the routine dissection in the Department of Anatomy, Shridevi Institute of Medical Sciences and Research Hospital, Tumakuru. From the right lateral cord, separation of few nerve fibres forming the lateral root of the median nerve was appreciated. The lateral root joins the medial root of the medial cord, after emerging out of the ulnar nerve and forms the initial segment of median nerve. Before the union of lateral and medial roots of initial segment of median nerve, ulnar nerve, medial cutaneous nerve of arm and medial cutaneous nerve of forearm descends along the medial aspect of the right arm. From the left lateral cord musculocutaneous nerve pierces the coracobrachialis. Before piercing the muscle, it gives one vascular branch and a motor branch. After piercing, the musculocutaneous nerve runs downwards and gives a motor branch to left biceps brachii. Variations of brachial plexus are frequently subjected to compression neuropathy. During surgical approaches to the brachium region, awareness about the anatomical variations of lateral and medial cords is mandatory for diagnosing the peripheral nerve entrapment syndrome. An integrated understanding of these branches prevent iatrogenic injuries during surgical procedures.

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Cadaveric Study of Anatomical Variations in the Musculocutaneous Nerve and in the Median Nerve

Cited by 7 publications

References 8 publications

Variations of Median Nerve Formation in North Indian Population

Variations of Median Nerve Formation in North Indian Population

Absence of the Musculocutaneous Nerve; Two Case Reports and Literature Review

Bilateral cadaveric variations of musculocutaneous nerve and median nerve in the anterior brachium: a case report

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