scholarly journals Indirect traumatic musculocutaneous nerve injury confused with static line injury: A case report

2021 ◽  
Vol 26 (3) ◽  
pp. 613-616
Author(s):  
Eun Jin Kim ◽  
Kyoung-Eun Kim
Keyword(s):  
Case Report ◽  
Nerve Injury ◽  
Biceps Brachii ◽  
Musculoskeletal Injury ◽  
Musculocutaneous Nerve ◽  
Secondary Injury ◽  
Biceps Brachii Muscle ◽  
Upper Arm ◽  
Biceps Brachii Tendon ◽  
Indirect Injury

The musculocutaneous nerve is rarely injured because it is short and is located deep in the shoulder and arm. Damage is usually caused by direct injuries, including stabbing, explosion, and surgery in a war setting. Although indirect injury of the musculocutaneous nerve is extremely rare, it occurs in various situations. In military parachuting-related activities, musculoskeletal injury occurs most commonly, and static line injury is known as rupture of the biceps brachii tendon. However, musculocutaneous neuropathy can also result from secondary injury by the static line. The musculocutaneous nerve goes together with the biceps brachii muscle, and the musculocutaneous nerve could overstretch and compress within the coracobrachialis muscle where the nerve is relatively fixed due to the overloading of the upper arm with shoulder extension. This report focuses on the indirect musculocutaneous nerve injury with axonotmesis following an overloading event by the static line during military parachuting. In this case, some physicians may confuse nerve injury with static line injury, leading to delays in the diagnosis of neuropathy. If the biceps brachii muscle is damaged due to trauma, checking for the accompanying musculocutaneous nerve injury is necessary.

scholarly journals Absence of musculocutaneous nerve and accessory head of biceps brachii: a case report

2005 ◽  
Vol 38 (02) ◽  
pp. 114-146
Author(s):  
L Arora ◽  
R Dhingra
Keyword(s):  
Case Report ◽  
Median Nerve ◽  
Upper Limb ◽  
Biceps Brachii ◽  
Musculocutaneous Nerve ◽  
Nerve Supply ◽  
Biceps Brachii Muscle ◽  
Nerve Roots ◽  
Lateral Cutaneous Nerve ◽  
The Right

ABSTRACTDuring dissection of a 55-year-old female cadaver, we observed that three nerve roots contributed to the formation of Median nerve in her right upper limb. Along with this variation, absence of Musculocutaneous nerve was noticed. The muscles of front of arm i.e. Biceps Brachii, Brachialis and Coracobrachialis received their nerve supply from Median nerve. The Lateral cutaneous nerve of forearm was derived from Median nerve. Also an accessory head of Biceps Brachii muscle was present in the right arm of the same cadaver. It is extremely important to be aware of these variations while planning a surgery in the region of axilla or arm as these nerves are more liable to be injured during operations.

scholarly journals Isolated Musculocutaneous Nerve Injury in a Professional Baseball Player: A Case Report

2021 ◽  
Vol 11 (3) ◽  
Author(s):  
Takeshi Kataoka ◽  
Takeshi Kokubu ◽  
Yutaka Mifune ◽  
Atsuyuki Inui ◽  
Tetsuya Yamazaki ◽  
...  
Keyword(s):  
Nerve Injury ◽  
Biceps Brachii ◽  
Compound Muscle Action Potential ◽  
Musculocutaneous Nerve ◽  
Professional Baseball ◽  
Motor Unit Potential ◽  
Nerve Lesion ◽  
Biceps Brachii Muscle ◽  
Baseball Pitcher ◽  
The Right

Introduction: Musculocutaneous nerve lesion in a throwing athlete is a rare condition. We report the case of a professional baseball pitcher with an isolated musculocutaneous nerve lesion that occurred during a pitching motion. Case Presentation: The patient had radiating pain in the upper arm and weakness of elbow flexion. Physical examination revealed flaccid paralysis of the biceps brachii muscle and paresthesia in the right lateral forearm. Musculocutaneous nerve injury was suspected. Because some signs of recovery were observed within a few days, the patient received non-operative management. Nerve conduction studies at 2 weeks after the injury showed low-amplitude compound muscle action potential of the right biceps brachii muscle by stimulation of the musculocutaneous nerve. Needle electromyography showed markedly reduced motor unit potential recruitment in the biceps brachii muscle. He was diagnosed as having isolated musculocutaneous nerve injury. At 2 months after the injury, the muscle contraction and strength of the biceps brachii muscle improved. At 7 months after the injury, muscle weakness was fully recovered. His pitching ability returned to that of a competitive player. Conclusion: Because the neuroparalysis was incomplete and began to recover within a few days, we considered the pathology of this injury to be incomplete axonotmesis, which was successfully treated conservatively. Keywords: Isolated musculocutaneous nerve injury, baseball pitcher, axonotmesis.

scholarly journals Is it the coracobrachialis superior muscle, or is it an unidentified rare variant of coracobrachialis muscle?

2021 ◽  
Author(s):  
Łukasz Olewnik ◽  
Nicol Zielinska ◽  
Łukasz Gołek ◽  
Paloma Aragonés ◽  
Jose Ramon Sanudo
Keyword(s):  
Case Report ◽  
Rare Variant ◽  
Shoulder Joint ◽  
Biceps Brachii ◽  
Coracoid Process ◽  
Biceps Brachii Muscle ◽  
Shoulder Region

AbstractThe coracobrachialis muscle (CBM) originates from the apex of the coracoid process, in common with the short head of the biceps brachii muscle, and from the intermuscular septum. The CBM demonstrates variability in both the proximal and distal attachment, with some extremely rare varieties, such as the coracobrachialis superior, coracobrachialis longus and coracocapsularis muscle. This case report describes an extremely rare variant of the coracobrachialis superior muscle, or a very rare variant of the CBM. Our findings highlight the importance of muscle variants in the shoulder region, especially the coracoid region, and are significant for radiologists, anatomists, physiotherapists and surgeons specializing in the shoulder joint.

Ultrasonographic and CT arthrography findings in two dogs with biceps brachii tendon avulsion

2020 ◽  
Vol 8 (1) ◽  
pp. e000989
Author(s):  
Eirini Pappa ◽  
Andy Tomlinson ◽  
Amy Ferreira ◽  
Rob Pettitt ◽  
Jeremy Mortier
Keyword(s):  
Case Report ◽  
Contrast Medium ◽  
Tendon Rupture ◽  
Biceps Brachii ◽  
Filling Defect ◽  
Advanced Imaging ◽  
Ct Arthrography ◽  
Shoulder Joints ◽  
Biceps Brachii Tendon ◽  
Tendon Avulsion

This report describes the ultrasonographic and CT arthrography (CTA) findings in biceps brachii tendon rupture in two dogs. Ultrasonographic examination of the affected shoulder joints preceded advanced imaging in both dogs and was suggestive of partial or complete avulsion/rupture of the biceps brachii tendon and chronic tendonitis. Subsequent CTA demonstrated complete rupture/avulsion of the biceps brachii tendon in the affected shoulder joints in both dogs. The biceps brachii tendon could be identified as a contrast filling defect within the synovial space. Pooling of the contrast medium was identified close to its origin and was suggestive of biceps brachii tendon rupture in both cases described here. In this case report, avulsion of the biceps brachii tendon was suspected using ultrasonography alone but confirmed by CTA.

Case report of infrequent variation of third head of biceps brachii muscle

2017 ◽  
Vol 66 ◽  
pp. S93
Author(s):  
Divya Chavda ◽  
Meghana Joshi ◽  
Bhavin Kodiyatar ◽  
Ila Sutterwala
Keyword(s):  
Case Report ◽  
Biceps Brachii ◽  
Biceps Brachii Muscle
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