scholarly journals Multiple variations in the course and motor branching pattern of the musculocutaneous nerve with unusual communication with the median nerve

2016 ◽  
Vol 75 (4) ◽  
pp. 555-559
Author(s):  
V. Chentanez ◽  
P. Jaruprat ◽  
P. Udomchaisakul ◽  
S. Agthong ◽  
T. Huanmanop
Keyword(s):  
Median Nerve ◽  
Musculocutaneous Nerve ◽  
Branching Pattern

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

2019 ◽  
Vol 36 (02) ◽  
pp. 122-125
Author(s):  
Abhilasha Priya ◽  
Chandni Gupta ◽  
Antony Sylvan D'souza
Keyword(s):  
Brachial Plexus ◽  
Median Nerve ◽  
Peripheral Nerves ◽  
Anatomical Variations ◽  
Musculocutaneous Nerve ◽  
Branching Pattern ◽  
Kasturba Medical College ◽  
Upper Limbs ◽  
Medical College ◽  
Lateral Cord

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.

The Branching Pattern and Communications of the Musculocutaneous Nerve

2007 ◽  
Vol 32 (5) ◽  
pp. 560-562 ◽  
Author(s):  
A. KRISHNAMURTHY ◽  
S. R. NAYAK ◽  
L. VENKATRAYA PRABHU ◽  
R. P. HEGDE ◽  
S. SURENDRAN ◽  
...  
Keyword(s):  
Median Nerve ◽  
Peripheral Nerves ◽  
Anatomical Variation ◽  
Anatomical Variations ◽  
Clinical Findings ◽  
Musculocutaneous Nerve ◽  
Branching Pattern ◽  
Upper Limbs ◽  
Lateral Aspect ◽  
Upper Arm

Anatomical variations of peripheral nerves are important and can help explain otherwise incomprehensible clinical findings. A study of 26 right and 18 left formalin-preserved upper limbs identified the fact that the musculocutaneous nerve is subject to considerable anatomical variation, including communication with the median nerve. A study of its branching pattern made us aware of why debility after trauma to the lateral aspect of the upper arm may be more than expected, and this study considers the clinical and surgical importance of these variations of the musculocutaneous nerve.

scholarly journals Anatomical study of variations of musculocutaneous nerve

2016 ◽  
Vol 05 (03) ◽  
pp. 143-147
Author(s):  
P. S Chitra ◽  
M Sobana
Keyword(s):  
Median Nerve ◽  
Brachial Plexus Block ◽  
Anatomical Study ◽  
Anatomical Variations ◽  
Musculocutaneous Nerve ◽  
Branching Pattern ◽  
Biceps Muscle ◽  
Orthopedic Surgeons ◽  
South Indian ◽  
Plexus Block

Abstract Background and aim: The musculocutaneous nerve is responsible for the innervation of the flex or musculature of the elbow and the skin sensitivity from elbow to wrist by an anterior and posterior branch along the radial border of the forearm Variation in the origin, course, branching pattern and termination of musculocutaneous nerve in the arm has been often reported earlier and the present study about the variations of musculocutaneous nerve was carried out to identity more such variations in South Indian Subjects. Materials and methods: The study was carried out on 40 formalin preserved cadavers i.e. 80 upper limbs. Results: Variations were found in four separate limbs, in two limbs the musculocutaneous nerve was absent (2.5%), in one limb there was a distal communication between musculocutaneous nerve and median nerve associated with the three - headed biceps muscle (1.25%) and in one limb the musculocutaneous nerve neither pierced the coracobrachialis nor had any communication with median nerve (1.25%). Conclusion: Such anatomical variations in musculocutaneous nerve would be of value to the practicing neurosurgeons, orthopedic surgeons, anesthetists during surgical procedures including brachial plexus block.

scholarly journals Formation, trajectory and distribution variants of the median nerve of the fetus

2017 ◽  
Vol 23 (3) ◽  
pp. 142-149
Author(s):  
I. S. Tudorache ◽  
P. Bordei ◽  
D. M. Iliescu
Keyword(s):  
Median Nerve ◽  
Ulnar Nerve ◽  
Upper Limb ◽  
Lateral Root ◽  
Axillary Artery ◽  
Single Case ◽  
Musculocutaneous Nerve ◽  
Single Nerve ◽  
Nerve Fascicle ◽  
Medial Nerve

AbstractOur study was performed by dissection on a number of 54 nervous trunks of the median nerve of the fetus. We found that the median nerve is always formed from two roots, their joining being at different levels of the upper limb, between the axilla and the elbow. The axilla nerve trunk was formed at the level of the axillary region, in 38.89% of the cases, in 22.22% of the cases the union was made at the middle part of the arm, and in 38.89% of the cases in the elbow. The lateral root of the medial nerve was formed in 55.56% of cases from a single nerve fascicle, in 44.44% of cases consisting of two nerve fascicles. The medial root was formed in 61.11% of cases from a single nerve fascicle, in 38.89% of the cases being made up of two nerve fascicles. In 27.78% of cases, the medial root passed behind the axillary artery. Regarding the volume of the two roots, we found that in 44.44% of the cases, the lateral root was more voluminous, in 27.78% of cases, the median root was larger and in 27.78% of cases, the two roots were approximately equal. We have encountered situations where a ramification for the forearms muscles emerged from the lateral root. Occasionally, a ram for the brachial muscle was detached from the medial root, and from the lateral root a ram for the biceps muscle, both muscles receiving branches also from the musculocutaneous nerve. We have encountered a single case where the median nerve inches the anterior muscles of the arm, missing the musculocutaneous nerve. In cases of low joining of the roots, we have encountered cases where a lateral root formed a ram for forearm muscles. The anastomoses between the two median nerve roots can sometimes be located just above their union or anterior to the lower portion of the axillary artery. In one case, we encountered between the two roots, above their union, the existence of three oblique anastomoses, the two upper ones from the lateral to the medial root, and the third from the medial root to the lateral root. Common are anastomoses between the roots of the roots and the root on the opposite side. The most common are the anastomosis between the medial fascicle of the lateral root and the medial root of the median nerve. In one case, we encountered a double overlap between the musculocutaneous nerve and the lateral nerve root. In one case, we encountered a strong anastomosis between the medial nerve fascicle of the medial root and the radial nerve. Common and at all levels of the upper limb are the anastomoses between the median and ulnar nerves. In the case of a low union of the two median roots, we encountered anastomoses between a root of the root and the ulnar nerve, or between a root and the ulnar nerve. I encountered a single case with an anastomosis, Martin- Gruber, which was previously passing through the ulnar and interos-like arteries and from which the anterior forearm muscles were detached.

scholarly journals Lower level of formation of lateral cord, variable formation of median nerve and communications between median and musculocutaneous nerve

2014 ◽  
Vol 5 (9) ◽  
pp. 464
Author(s):  
Gangadhara Muninarayana Swamy ◽  
Shakunthala Rao N ◽  
Krishna Kishore G ◽  
Manivannan K ◽  
H. R. Krishna Rao
Keyword(s):  
Median Nerve ◽  
Musculocutaneous Nerve ◽  
Lateral Cord

scholarly journals Variations in the course and branching pattern of musculocutaneous nerve

2013 ◽  
Vol 02 (04) ◽  
pp. 195-199
Author(s):  
Amar Jayanthi A. ◽  
Arunkumar K G.
Keyword(s):  
Median Nerve ◽  
Growth Cone ◽  
Single Case ◽  
Clinical Importance ◽  
Anatomical Variations ◽  
Musculocutaneous Nerve ◽  
Axonal Pathfinding ◽  
Chi Square ◽  
Medical College ◽  
Chi Square Test

Abstract Background and aim: The variations in the course and communicating branches of musculocutaneous nerve is of clinical importance in the treatment of recurrent compression neuropathies and in the diagnosis of median nerve lesions. Most of the reports on anatomical variations of musculocutaneous nerve are single case studies and such studies with emphasis on gender difference in a sample of Keralite population are rarely reported. The objective of the present study is to observe the variations in the course of musculocutaneous nerve with special reference to communications with other nerves of the arm and to study the correlation between gender and variations of the nerve. Materials and Methods: Two hundred and sixty four arms were dissected in the department of Anatomy, Government medical college, Thrissur and studied for variations of muculocutaneous nerve. Analysis was done with epi info, using proportions, confidence interval and Chi Square test. The communications noted were classified using the available classifications of Le Minor, Venieratos and Anagnostopoulou and Choi et al. Results: Nerve variations were seen in 24.2 % cases which include, absence of the nerve (3.4%), nerve not piercing coracobrachialis (12.4%) and communication to median nerve (15.1 %). All the variations observed were statistically not significant. The embryological basis for the axonal pathfinding is considered as a result of both guidance molecules and electrical activity that change the calcium homeostasis within the growth cone to regulate growth cone turning. Conclusion: Variations that were observed in the present study may give sufficient and relevant data on the nerves, among Keralite population in which studies are few.

scholarly journals Unusual variation in musculocutaneous nerves

1970 ◽  
Vol 7 (4) ◽  
pp. 408-410 ◽  
Author(s):  
C Bhattarai ◽  
PP Poudel
Keyword(s):  
Peripheral Nerve ◽  
Clinical Investigation ◽  
Nerve Repair ◽  
Clinical Importance ◽  
Anatomical Variations ◽  
Musculocutaneous Nerve ◽  
Branching Pattern ◽  
Variational Study ◽  
The Right ◽  
Nerve System

Background: Variations in origin, course, branching pattern, termination and connections of the musculocutaneous nerve in the arm are not as uncommon as was once thought. Variational study of nerve in Nepalese is very less and can be of surigical-clinical importance. This opinion led us to performing this study. Objectives: The aim of this study was to a study in Nepalese which could be important for clinical investigation and the surgical treatment of peripheral nerve injury. Materials and methods: This study was carried out in Manipal College of medical sciences (MCOMS). Dissection of formalised 16 cadavers (n=32 upper limbs) were carried out using normal dissection kit with the help of standard dissection manual in two and half years. Results: The study revealed the variation in course, branching pattern and termination of musculocutaneous nerve in 6.25% of cases unilaterally on the right side. No statistically significant differences by gender and side were observed. Conclusion: This present study provides the evidence of variation of musculocutaneous nerve in Nepalese. The knowledge of the anatomical variations of the peripheral nerve system can help explain an incomprehensible clinical sign. Key words: Musculocutaneous nerve; Median nerve; Brachial plexus; Peripheral nerve repair. DOI: 10.3126/kumj.v7i4.2763 Kathmandu University Medical Journal (2009) Vol.7, No.4 Issue 28, 408-410

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