scholarly journals Unilateral variant motor innervations of flexure muscles of arm

2010 ◽  
Vol 01 (01) ◽  
pp. 51-53 ◽  
Author(s):  
A S Yogesh ◽  
M Joshi ◽  
V K Chimurkar ◽  
R R Marathe
Keyword(s):  
Median Nerve ◽  
Biceps Brachii ◽  
Musculocutaneous Nerve ◽  
Cutaneous Nerve ◽  
Lateral Cord ◽  
Separate Branch ◽  
Male Cadaver ◽  
Lateral Cutaneous Nerve ◽  
Muscular Branch ◽  
The Right

ABSTRACTThe musculocutaneous nerve usually branches out from the lateral cord of brachial plexus. It innervates the corcobrachialis, biceps brachii and brachialis muscles and continues as the lateral cutaneous nerve of forearm without exhibiting any communication with the median nerve or any other nerve. We report unilateral variation in motor innervations of the left arm in a 58-year-old male cadaver. The musculocutaneous nerve was found to be absent. A muscular branch of the median nerve was supplying the coracobrachialis muscle. In the middle of arm, the median nerve was found to be branching out, bifurcating and supplying the long and short head of biceps. The median nerve was found to be giving a separate branch, which supplied the brachialis muscle and continued as the lateral cutaneous nerve of forearm. The right sided structures were found to be normal. Surgeons should keep such variations in mind while performing arm surgeries.

scholarly journals Anatomical Variations of the Musculocutaneous and Median Nerves: A Case Report

Folia Medica ◽  
2019 ◽  
Vol 61 (2) ◽  
pp. 327-331 ◽  
Author(s):  
Marzieh Darvishi ◽  
Ardeshir Moayeri
Keyword(s):  
Median Nerve ◽  
Biceps Brachii ◽  
Anatomical Variations ◽  
Musculocutaneous Nerve ◽  
Upper Extremities ◽  
Terminal Branch ◽  
Lateral Cord ◽  
Pectoralis Minor ◽  
Male Cadaver ◽  
The Right

Abstract The musculocutaneous nerve is a large terminal branch of the lateral cord of the brachial plexus. It passes under the pectoralis minor and penetrates the coracobrachialis muscle, descending between the biceps brachii and brachialis muscles in the arm. After dissection in upper extremities in a 28-year-old male cadaver, the median and musculocutaneous nerve were found to have variations on the right side where the musculocutaneous nerve formed communications with the median nerve. The median nerve innervated muscles of the front of the arm in this cadaver. In addition, the musculocutaneous nerve did not pierce the coracobrachialis muscle on the right side. Knowledge of these variations is extremely important when planning a surgery in the region of axilla.

scholarly journals Absence of the musculocutaneous nerve: a rare anatomical variation with possible clinical-surgical implications

2008 ◽  
Vol 126 (5) ◽  
pp. 288-290 ◽  
Author(s):  
José Humberto Tavares Guerreiro Fregnani ◽  
Maria Inez Marcondes Macéa ◽  
Celina Siqueira Barbosa Pereira ◽  
Mirna Duarte Barros ◽  
José Rafael Macéa
Keyword(s):  
Median Nerve ◽  
Lateral Surface ◽  
Biceps Brachii ◽  
Anatomical Variation ◽  
Musculocutaneous Nerve ◽  
The Third ◽  
Brachialis Muscle ◽  
Male Cadaver ◽  
The Right ◽  
Unknown Case

CONTEXT: The musculocutaneous nerve is one of the terminal branches of the lateral fasciculus of the brachial plexus, and is responsible for innervation of the flexor musculature of the elbow and for skin sensitivity on the lateral surface of the forearm. Its absence has been described previously, but its real prevalence is unknown. CASE REPORT: A case of absence of the musculocutaneous nerve that was observed during the dissection of the right arm of a male cadaver is described. The area of innervation was supplied by the median nerve. From this, three branches emerged: one to the coracobrachialis muscle, another to the biceps brachii muscle and the third to the brachialis muscle. This last branch continued as a lateral antebrachial cutaneous nerve. This is an anatomical variation that has clinical-surgical implications, considering that injury to the median nerve in this case would have caused unexpected paralysis of the flexor musculature of the elbow and hypoesthesia of the lateral surface of the forearm.

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 Musculocutaneous nerve substituting for the distal part of radial nerve: A case report and its embryological basis

2011 ◽  
Vol 02 (01) ◽  
pp. 074-076 ◽  
Author(s):  
AS Yogesh ◽  
RR Marathe ◽  
SV Pandit
Keyword(s):  
Upper Limb ◽  
Radial Nerve ◽  
Musculocutaneous Nerve ◽  
Cutaneous Nerve ◽  
Triceps Brachii ◽  
Deep Branch ◽  
Male Cadaver ◽  
Lateral Cutaneous Nerve ◽  
The Right ◽  
Extensor Carpi Radialis

ABSTRACTIn the present case, we have reported a unilateral variation of the radial and musculocutaneous nerves on the left side in a 64-year-old male cadaver. The radial nerve supplied all the heads of the triceps brachii muscle and gave cutaneous branches such as lower lateral cutaneous nerve of the arm and posterior cutaneous nerve of forearm. The radial nerve ended without continuing further. The musculocutaneous nerve supplied the brachioradialis, extensor carpi radialis longus and extensor carpi radialis brevis muscles. The musculocutaneous nerve divided terminally into two branches, superfi cial and deep. The deep branch of musculocutaneous nerve corresponded to usual deep branch of the radial nerve while the superfi cial branch of musculocutaneous nerve corresponded to usual superfi cial branch of the radial nerve. The dissection was continued to expose the entire brachial plexus from its origin and it was found to be normal. The structures on the right upper limb were found to be normal. Surgeons should keep such variations in mind while performing the surgeries of the upper limb.

scholarly journals Unilateral absence of musculocutaneus nerve and its clinical significance

2017 ◽  
Vol 5 (6) ◽  
pp. 2827
Author(s):  
Aarti Rohilla ◽  
Jyoti Rohilla ◽  
Kamal Singh ◽  
Suresh Kanta Rathee
Keyword(s):  
Median Nerve ◽  
Nerve Injury ◽  
Clinical Significance ◽  
Musculocutaneous Nerve ◽  
Cutaneous Nerve ◽  
Lateral Cord ◽  
Flexor Muscles ◽  
Lateral Cutaneous Nerve ◽  
Median Nerve Injury

Musculocutaneous nerve arises from lateral cord and supplies the muscles of front of arm and then continues as lateral cutaneous nerve of forearm. Musculocutaneous nerve has frequent variations. Nerve may be doubled or even absent. There is unilateral absence of musculocutaneous nerve in this case. Musculocutaneous nerve arises from lateral cord and supplies the muscles of front of arm and then continues as lateral cutaneous nerve of forearm. Musculocutaneous nerve has frequent variations. Nerve may be doubled or even absent. There is unilateral absence of musculocutaneous nerve in this case. Musculocutaneous nerve was seen to be absent in one case on right side. Branches arise either from lateral cord or median nerve to supply the flexor muscles of arm. Total absent musculocutaneous nerve is quiet uncommon. Hence knowledge of this variation can help clinicians in understanding the cause of weakness or paralysis of flexor muscles of arm due to median nerve injury which is unusual.

scholarly journals Variation in the area of distribution of the lateral pectoral nerve and a communicating branch between musculocutaneous and median nerve : A case report

2015 ◽  
Vol 05 (04) ◽  
pp. 088-091
Author(s):  
Divia Paul A. ◽  
Manisha Rajanand Gaikwad
Keyword(s):  
Median Nerve ◽  
Biceps Brachii ◽  
Clinical Importance ◽  
Lateral Cord ◽  
Pectoral Nerve ◽  
Communicating Branch ◽  
Additional Branch ◽  
Before And After ◽  
Male Cadaver ◽  
Indian Male

AbstractVariations in the distribution of the lateral cord and its branches in the infraclavicular part of the brachial plexus are common and significant to the neurologists, surgeons, anaesthetists and the anatomists [1]. The present case describes a rare variation of the lateral pectoral nerve giving an additional branch to supply biceps brachii muscle and ends by joining inferior collateral branch of brachial artery. Also it was observed that the musculo cutaneous nerve received communicating branches from the median nerve before and after piercing the coracobrachialismuscle. The above observations were observed during routine dissection of a 55 year old Indian male cadaver. The musculocutaneous nerve, lateral pectoral nerve and its branches were identified and protected. The clinical importance of the variation is discussed.

scholarly journals Communication between radial nerve and medial cutaneous nerve of forearm

2010 ◽  
Vol 01 (01) ◽  
pp. 49-50 ◽  
Author(s):  
S. Yogesh ◽  
RR Marathe ◽  
SR Mankar ◽  
M Joshi ◽  
YA Sontakke
Keyword(s):  
Brachial Plexus ◽  
Radial Nerve ◽  
Cutaneous Nerve ◽  
Upper Arm ◽  
Male Cadaver ◽  
Lateral Cutaneous Nerve ◽  
The Right ◽  
Extensor Carpi Radialis

ABSTRACTRadial nerve is usually a branch of the posterior cord of the brachial plexus. It innervates triceps, anconeous, brachialis, brachioradialis, extensor carpi radialis longus muscles and gives the posterior cutaneous nerve of the arm, lower lateral cutaneous nerve of arm, posterior cutaneous nerve of forearm; without exhibiting any communication with the medial cutaneous nerve of forearm or any other nerve. We report communication between the radial nerve and medial cutaneous nerve of forearm on the left side in a 58-year-old male cadaver. The right sided structures were found to be normal. Neurosurgeons should keep such variations in mind while performing the surgeries of axilla and upper arm.

scholarly journals A rare variation of formation of median nerve - a case report.

2015 ◽  
Vol 04 (02) ◽  
pp. 110-113
Author(s):  
Monica Diana S. ◽  
Ramesh Kumar Subramanian ◽  
Senthil Kumar S.
Keyword(s):  
Median Nerve ◽  
Lateral Root ◽  
Medial Epicondyle ◽  
Normal Pattern ◽  
Rare Variation ◽  
Medical College ◽  
Lateral Cord ◽  
Male Cadaver ◽  
Muscle Nerve ◽  
The Right

AbstractMany variations have been reported regarding formation of the brachial plexus and its branches. Here the authors report a rare variation pertaining to lateral cord of median nerve. During routine dissection, at Sri Ramachandra Medical College and Hospital, Chennai, in the department of anatomy, in a male cadaver in the right upper limb, the authors found an additional lateral root from lateral cord joining the medial root to form the median nerve. Musculocutaneous nerve did not pierce the coracobrachialis muscle instead it gave a direct branch to the muscle. Nerve supply to biceps and brachialis were of normal pattern. The musculo cutaneous nerve communicated with the median nerve before supplying other muscles. Median nerve was medial throughout the arm but about 7 cm above the level of medial epicondyle it crossed the brachial artery from medial to lateral. Morphometry of the nerves were studied by measurements. Knowledge of these variations and measurements will be helpful during surgical and anaesthetic procedures in the axilla.

scholarly journals Absence of Musculocutaneous Nerve: Embryological Basis

2013 ◽  
Vol 3 (2) ◽  
pp. 21-24
Author(s):  
Arvind Kumar Pankaj ◽  
CS Ramesh Babu ◽  
Archana Rani ◽  
Anita Rani ◽  
Jyoti Chopra ◽  
...  
Keyword(s):  
Brachial Plexus ◽  
Median Nerve ◽  
Ulnar Nerve ◽  
Lateral Root ◽  
Axillary Artery ◽  
Musculocutaneous Nerve ◽  
Medical Sciences ◽  
Lateral Cord ◽  
Pectoral Nerve ◽  
Male Cadaver

Variation of brachial plexus characterized by the absence of musculocutaneous nerve in right arm was found during routine dissection of a 54 year old male cadaver. After giving lateral pectoral nerve, rest of the lateral cord continued as lateral root of median nerve. An unusual branch was arising from lateral cord which crossed the axillary artery anteriorly and then divided into two branches. One of these branches joined ulnar nerve and other medial root of median nerve. All the muscles of front of arm were supplied by branches of median nerve. These variations are important for the anesthetists, surgeons, neurologists during surgery and for anatomists during dissection in the region of axilla. DOI: http://dx.doi.org/10.3126/ajms.v3i2.6626 Asian Journal of Medical Sciences 3(2012) 21-24

scholarly journals A Variant Course of Lateral Root of Median Nerve: Embryological Basis

2013 ◽  
Vol 5 (2) ◽  
pp. 146-150
Author(s):  
Mumal Nagwani ◽  
Archana Rani ◽  
Anita Rani ◽  
Jyoti Chopra ◽  
Ajai Kumar Srivastava ◽  
...  
Keyword(s):  
Median Nerve ◽  
Lateral Root ◽  
Medical Science ◽  
Science Volume ◽  
Musculocutaneous Nerve ◽  
Male Cadaver ◽  
The Right

During routine dissection of the right arm of 50 year old male cadaver, we observed that the lateral root of median nerve was piercing the coracobrachialis muscle before joining the medial root of median to form the median nerve. The lateral root of median nerve did not give any branch within the muscle and no communication was observed between musculocutaneous nerve and lateral root of median nerve within the coracobrachialis muscle or in the later course of these two nerves. The same muscle was being pierced by musculocutaneous nerve which was giving branches to the muscle. These variations are important for the anesthetists, surgeons, neurologists during surgery and anatomists during dissection in the region of axilla. DOI: http://dx.doi.org/10.3126/ajms.v5i2.8195 Asian Journal of Medical Science, Volume-5(2) 2014: 146-150  

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