Bilateral variations of brachial plexus involving the median nerve and lateral cord: An anatomical case study with clinical implications

Butz, James J; Shiwlochan, Devina; Brown, Kevin; Prasad, AM; Murlimanju, B. V.; Viswanath, Srikanteswara

doi:10.4066/amj.2014.2070

Cited by 15 publications

(12 citation statements)

References 11 publications

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“…In 7 [10%] specimens the median nerve is formed in the arm in front of the brachial artery instead in axilla. Similar findings were reported earlier [8,10,20,12,21]. In the present study, musculocutaneous nerve was found to be not piercing the coracobrachialis in 3 [4.28%] limbs which is similar to the findings of Jamuna M (6%, n=50) [17], Kishore C K (7.5%, n=40) [22], Shiv Goel [9] and Girish V Patil [23].…”

Section: Methodssupporting

confidence: 81%

Morphometric Study of Upper End of Tibia in Gujarat Region and Its Clinical Implication in Knee Arthroplasty

Zalawadia¹,

Patel²

2018

IJAR

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Section: Methodssupporting

confidence: 81%

Morphometric Study of Upper End of Tibia in Gujarat Region and Its Clinical Implication in Knee Arthroplasty

Zalawadia¹,

Patel²

2018

IJAR

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“…Therefore, it becomes important to have knowledge regarding the normal anatomy as well as any observed variations in the muscle. 18 Fig. 3 Communication between the median nerve (MN) and the musculocutaneous nerve(MCN).…”

Section: Discussionmentioning

confidence: 99%

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

2019

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Introduction The musculocutaneous nerve and the median nerve are branches from the lateral cord of the brachial plexus with a root value of C5, C6, and C7. The medial root of the median nerve is a branch of the medial cord. The present study aims at observing any variations in these peripheral nerves, so that this knowledge can be utilized by surgeons, anesthesiologists, and orthopedicians during surgical procedures and nerve block. Materials and Methods The present study was carried on 30 adult embalmed cadavers (60 upper limbs) in the department of anatomy of the Kasturba Medical College , Manipal, India. The infraclavicular part of the brachial plexus was dissected, and any anatomical variations in the formation and in the branching pattern of the musculocutaneous nerve and of the median nerve were noted and photographs were taken. Results The median nerve was noted to be formed from 3 roots in 8 out of 60 dissected upper limbs (13.33%). The musculocutaneous nerve was absent in 5% of the dissected limbs, and communications between these 2 nerves were noted in 13.33% of the dissected limbs. Conclusions Noted variations of the nerves may be of help to surgeons operating in the axillas and in the arms.

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“…Butz et al [2] state that signalling mechanisms during embryological development might play a role during the fifth week of development, axons of the spinal nerves grow distally to initiate contact with the mesenchyme of the limb, and inadequate signalling may negatively influence the normal formation of the plexus.…”

Section: Discussionmentioning

confidence: 99%

“…Other variations have been described, the most common being the anatomical variation in the origin of the median and MNs, in which the lateral cord of the brachial plexus pierced the coracobrachialis muscle and then bifurcated in the middle third of the arm into two terminal branches originating the median and MNs [1,2]. Our finding differs from these studies as the lateral cord did not pierce the coracobrachialis muscle but involved it, and then bifurcated inferiorly into two terminal branches, the median and MNs.…”

Section: Discussionmentioning

confidence: 99%

An unusual case of accessory head of coracobrachialis muscle involving lateral cord of brachial plexus and its clinical significance

et al. 2017

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Knowledge of anatomical variations in the peripheral nervous system is key in the interpretation of unusual clinical signs or during physical or diagnostic imaging. This case study is a description of an anatomical variation between the coracobrachialis muscle and brachial plexus. In a routine dissection in the human anatomy laboratory, we were faced with an anatomical variation in the coracobrachialis muscle, observed in the upper right limb of a male cadaver. The coracobrachialis muscle had a common origin at the apex of the coracoid process and then divided into two heads. The lateral head followed its normal course until insertion into the middle third of the humerus, while the medial head involved the lateral cord of the brachial plexus before insertion into the intermuscular septum in the proximal third of the humerus. Atypical anatomical variations have clinical andsurgical implications in procedures such as brachial plexus block and lateral cord compression. In these cases the result could be paralysis of the flexor musculature of the forearm and hypoesthesia of the forearm. (Folia Morphol 2017; 76, 4: 762-765)

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Bilateral variations of brachial plexus involving the median nerve and lateral cord: An anatomical case study with clinical implications

Cited by 15 publications

References 11 publications

Morphometric Study of Upper End of Tibia in Gujarat Region and Its Clinical Implication in Knee Arthroplasty

Morphometric Study of Upper End of Tibia in Gujarat Region and Its Clinical Implication in Knee Arthroplasty

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

An unusual case of accessory head of coracobrachialis muscle involving lateral cord of brachial plexus and its clinical significance

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