A study of anatomical variations of median nerve in human cadavers

Channabasanagouda,; Patil, Shrish; Shinde, Vijaykumar; Jevor, P S; Nidoni, Madhumati

doi:10.7439/ijbr.v4i12.444

Cited by 3 publications

(5 citation statements)

References 7 publications

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“…Similarly, Channabasanagouda et al observed the MN's formation in the arm's region with an extremely high incidence of 40%. In particular, such MN's formation was located in the upper third of the arm in 20%, in the middle third in 12% and in the lower third of the arm in 4% of the studied specimens (7). The abovementioned authors stated that such ectopic MN's formation might confuse the operative surgeon during surgical intervention in the arm or the anesthetist while performing block anesthesia.…”

Section: Discussionmentioning

confidence: 86%

“…Apart from the abovementioned usual detected MN's pattern of formation, MN can be formed by the union of three roots, two lateral and one medial (10,17). Such an incidence has been noticed in 11.7% (13), 14% (8), 26% (7) or as high as 52% (9). Occasionally, the third additional lateral root was derived Kolagi et al (11) observed three roots from the lateral cord of the brachial plexus to be passing obliquely anterior to the AA and joining separately with the medial root of the MN.…”

Section: Discussionmentioning

confidence: 99%

“…The two unusual lateral roots in a case report of Uzun et al were noted to take their origin from the musculocutaneous nerve and joined the MN (20), whereas Pandey et al (14), Satyanarayana et al (18) and of AA uniting anterior or lateral to it (21). MN is formed on the anterior surface of AA in 1.53% (6) or 8.3% (13) or 10% (7). Such anterior relationship of the MN and AA possesses clinical value, since MN roots potentially compress the AA including ischemic symptomatology.…”

Section: Discussionmentioning

confidence: 99%

“…Its normal pattern of formation by two roots has been mentioned varying between 48-88.3% (9,13), whereas its formation by three or very rarely four roots has been described as well (14,17). In addition, low MN's distal to the axilla has been found in an incidence of 3.5% to 40% of the specimens (7,14), whilst the MN's anterior or medial positioning in regards to AA has been prescribed in the literature (13).…”

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confidence: 99%

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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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Section: Discussionmentioning

confidence: 86%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

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Five Roots Pattern of Median Nerve Formation

Natsis

Paraskevas

Tzika

2016

Acta Med. (Hradec Kralove, Czech Repub.)

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“…In the included studies, the classification originally proposed by Venieratos (Venieratos and Anagnostopoulou, ) was most frequently used (Prasada Rao and Chaudhary, ; Chauhan and Roy, ; Beheiry, ; Arora and Dingra, ; Loukas and Aqueelah, ; Maheswari and Sadanandam, ; Oluyemi et al, ; Chitra, ; Krishnamurthy et al, ; Uysal et al, ; Guerri‐Guttenberg and Ingolotti, ; Budhiraja et al, ; Kervancioglu et al, ; Lokanadham and Subhadra Devi, ; Sawant et al, ; Balasubramanian and Rajanna, ; Chaudhary et al, ; Kaur and Singla, ; Kumar et al, ; Master and Gupta, ; Meenakshisundaram nad Govindarajan, ; Sonje et al, ), followed by the classification according to Le Minor (Le Minor, ; Chauhan and Roy, ; Beheiry, ; Arora and Dingra, 2005; Maheswari and Sadanandam, ; Oluyemi et al, ; Chitra, ; Krishnamurthy et al, ; Guerri‐Guttenberg and Ingolotti, ; Lokanadham and Subhadra Devi, ; Sawant et al, ; Balasubramanian and Rajanna, ; Chaudhary et al, ; Dhar et al, ; Kaur and Singla, ; Kumar et al, ; Cambon‐Binder and Leclercq, ; Sekhar and Sugavasi, ; Master and Gupta, ; Meenakshisundaram nad Govindarajan, ; Sonje et al, ). The authors of seven papers suggested their own methods of classification (Kosugi et al ; Choi et al ; Loukas and Aqueelah, ; Uysal et al, ; Maeda et al, ; Guerri‐Guttenberg and Ingolotti, ; Kaur and Singla, ) and some of these were successively applied in other studies, while some authors did not attempt to classify the encountered variations of MCN (Yang et al, ; Chiarapattanakom et al, ; Aktan et al, ; Pacha Vicente et al, ; Channabasanagouda et al, ; Bhattarai and Poudel,…”

Section: Resultsmentioning

confidence: 99%

Prevalence of musculocutaneous nerve variations: Systematic review and meta‐analysis

et al. 2018

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We aimed to establish the prevalence of the musculocutaneous nerve (MCN) variations and the probability of the variation being pure or mixed in the same plexus. We applied the principles of evidence-based anatomy to find, appraise, and synthesize data through a meta-analysis of anatomical studies. The variations were grouped based on the presence and location of the communicating branch with the median nerve and the origin of branches to anterior arm muscles. Forty-three cadaveric studies met the inclusion criteria, providing data from 4124 plexuses. The overall pooled prevalence of plexuses with MCN variations was 20%. Based on the classification applied in our study, the pooled prevalence of variations was 17% in region 1A, 20% in region 1B, 36% in region 2 and 49% in region 3. Importantly, 64.58% of variations in region 1A and 74.14% of variations in region 1B were mixed, that is, associated with a variation in another region. The odds of finding another variation in the presence of a variation in region 2 or 3 were equal 0.37 and 0.52, respectively, demonstrating a significantly lower probability of finding mixed variations involving these regions, when compared with region 1A. Variations of the MCN are most common in the part distal to the exit from within or beneath the coracobrachialis muscle. Proximal variations are more often associated with another variation located along the nerve. These findings can assist health care professionals in the treatment of brachial plexus lesions. Clin. Anat., 2018. © 2018 Wiley Periodicals, Inc.

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Bilateral Unusual Course of the Median Nerve, Variation in Branching Pattern of the Brachial and Superficial Ulnar Arteries: A Rare Case Report of Multiple Neuroarterial Variation

Ahmadpour

Foghi

2019

J Morphol Sci

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Introduction Bilateral unusual course of the median nerve accompanied with variations of the brachial artery branching pattern are uncommon. Materials and Methods During the routine educational dissection of an upper limb, an interesting neurovascular variation was found in a 45-year-old male cadaver. Results We found a bilateral unusual and variant course of the median nerve in the arm region. The right median nerve, after formation, descended from the medial to the brachial artery, crossed the brachial artery anteriorly from medial to lateral, then inferiorly and lied medially to the distal third of the brachial artery, while the left median nerve ran medial to the brachial artery, passing anteriorly from medial to lateral, and, at the distal end of the arm, it buried itself in the brachialis muscle. Another set of findings were absence of the superior and inferior ulnar collateral arteries, superficial ulnar artery in the forearm and common interosseus artery originated from radial artery. Conclusion These types of compound neurovascular variations are of great importance in orthopedic, vascular, reconstructive surgeries and even in routine nursing care.

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A study of anatomical variations of median nerve in human cadavers

Cited by 3 publications

References 7 publications

Five Roots Pattern of Median Nerve Formation

Five Roots Pattern of Median Nerve Formation

Prevalence of musculocutaneous nerve variations: Systematic review and meta‐analysis

Bilateral Unusual Course of the Median Nerve, Variation in Branching Pattern of the Brachial and Superficial Ulnar Arteries: A Rare Case Report of Multiple Neuroarterial Variation

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