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Four communications between median and musculocutaneous nerves
Shukla L,Soni G,Gaur N
International Journal of Anatomical Variations , 2010,
Abstract: The present article is in reference to a case, encountered in routine dissection, displaying four sites of communication between the musculocutaneous and the median nerves, whereas in the literature not more than two communications have been reported.
Various types of intercommunications between musculocutaneous and median nerves: An analytical study
Chitra R
Annals of Indian Academy of Neurology , 2007,
Abstract: Intercommunications between musculocutaneous nerve and median nerve deserve important interest in view of their clinical significance. In the study of 50 upper limb specimens, the various communications between the musculocutaneous and median nerve in the arm were observed carefully. The communications between the two nerves were found in 13 arms. Variations in the present study involving the median nerve and musculocutaneous nerve are important in repairs for trauma to the shoulder and the understanding of the median nerve and the musculocutaneous nerve dysfunction.
Comunicación Bilateral de los Nervios Músculocutáneo y Mediano: Aspectos Morfológicos e Importancia Clínica Bilateral Communications of the Musculocutaneous and Median Nerves: Morphological Aspects and Clinical Significance  [cached]
Aladino Cerda,Iván Suazo Galdames
International Journal of Morphology , 2012,
Abstract: Las comunicaciones entre los ramos terminales de plexo braquial son frecuentes y tienen importancia en la evaluación de traumatismos y procedimientos quirúrgicos de las regiones axilar y braquial. En este artículo presentamos un caso en el que durante la disección de rutina del miembro superior, se observó la presencia de comunicaciones bilaterales entre los nervios musculocutáneo y mediano. Los ramos comunicantes fueron descritos en su trayecto, relaciones y morfometría y se discutió acerca de la prevalencia e importancia clínica de estas comunicaciones. Communication of the musculocutaneous and median nerves of the brachial plexus is common and is important in the evaluation of trauma and surgical procedures in axillary and brachial regions. This paper presents a case in which during a routine dissection of upper limb the presence of bilateral communication between musculocutaneous and medium nerves was observed. Trajectory of communicating branches was described, relation and morphometry was discussed with regard to prevalence and clinical significance of these communications.
A rare coexistence of axillo-brachial neurovascular variations with embryological review
Roy H,Pradhan P,Deb S
International Journal of Anatomical Variations , 2011,
Abstract: Nerves and vessels as reach their target area sometimes violate their usual course, demonstrated as variant distribution. During routine dissection multiple such variations were found in a 60-year-old male cadaver unilaterally showing (a) third part of axillary artery dividing in superficial and deep branches as continued in arm, (b) the median nerve forming in unusual place and (c) the musculocutaneous nerve providing extra communicating branch to median nerve. Such a combined coexistent variation being extremely rare in literature, studied with probable embryological explanation.
E. Olave,C. Gabrielli,M. T. T. Braga,M. Del Sol
Revista chilena de anatomía , 2000,
Abstract: El nervio musculocutáneo es responsable de la inervación motora de los músculos anteriores del brazo, pudiendo transportar por una determinada distancia fibras del nervio mediano. Esas fibras componen un ramo comunicante entre ambos, el que puede o no estar presente. Con el propósito de determinar su frecuencia y nivel de localización en el brazo, disecamos 32 miembros superiores de 16 cadáveres formolizados de individuos adultos, brasileiros, de ambos sexos. El ramo comunicante fue encontrado en 10 casos (31,3%), 9 de ellos en el sexo masculino, 4 en el lado derecho y 6 en el lado izquierdo, siendo bilateral en dos individuos. Se constató macroscópicamente que el ramo comunicante se dispuso desde el nervio musculocutáneo hacia el nervio mediano en 9 casos (90% de los casos encontrados), observándose una disposición contraria en el caso restante. En un caso se presentó doble. El ramo se localizó totalmente dentro del tercio proximal del brazo en 2 casos (20%), dentro del tercio medio en 4 (40%) y entre el tercio proximal y medio en los 4 restantes (40%). El caso que presentó una disposición contraria se encontró totalmente en el tercio medio. La presencia de este ramo tiene una explicación embriológica y en lesiones del nervio musculocutáneo pueden ser afectadas estructuras inervadas por el nervio mediano. The musculocutaneous nerve is responsible for the motor innervation of the anterior arm muscles and sometimes it carryes by a short distance fibers of the median nerve. This fibers are part of a communicating branch between both, which may be ocurrent or not. With the object to detect their frequence of ocurrence and their localization level in the arm, 32 upper limbs from 16 formolized cadavers of brazilian individuals, from both sexes were dissected. The communicating branch was found in 10 cases (31.3 %), 9 of them on males with 4 cases in the right and 6 in the left side; in two individues it was bilateral. This investigation confirmed the macroscopical disposition of the communicating branch from the musculocutaneous nerve to the median nerve in 9 cases (90% of the total cases found) and at the contrary disposition in only one case. One of them was a double disposition. The branch was totally localized at the proximal third of the arm in two cases (20 %), inside the median third in 4 cases (40%) and between the proximal third an the median in the remaining 4 (40% of cases). The case with a contrary disposition was only found in the median third. The presence of this branch has an embriologic explanation and in cases of musculocutaneous nerve less
Unusual variation in musculocutaneous nerves  [PDF]
C Bhattarai,PP Poudel
Kathmandu University Medical Journal , 2009, DOI: 10.3126/kumj.v7i4.2763
Abstract: 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
Concurrent variations of median nerve, musculocutaneous nerve and biceps brachii muscle  [PDF]
Nayak S,Samuel VP,Somayaji N
Neuroanatomy , 2006,
Abstract: Variations in the nerves and muscles of the arm are not uncommon. We saw the concurrent variations of mediannerve, musculocutaneous nerve and biceps brachii muscle in the right upper limb. Biceps had an abnormal thirdhead. The median nerve was formed below the midpoint of the arm and passed through a tunnel in the thirdhead of the biceps along with brachial artery. The musculocutaneous nerve did not pierce coracobrachialismuscle. Median nerve and brachial artery passing through the third head of biceps may lead to neurovascularcompression symptoms.
Absence of Musculocutaneous Nerve: Embryological Basis  [PDF]
Arvind Kumar Pankaj, CS Ramesh Babu, Archana Rani, Anita Rani, Jyoti Chopra, Rakesh Kumar Verma, Navneet Kumar, Ajay Kumar Srivastava
Asian Journal of Medical Sciences , 2012, DOI: 10.3126/ajms.v3i2.6626
Abstract: 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
An accessory branch of musculocutaneous nerve joining median nerve  [PDF]
Kocabiyik N,Yalcin B,Yazar F,Ozan H
Neuroanatomy , 2005,
Abstract: During the educational gross anatomy dissections of the axilla and brachium of a 50-year-old male cadaver in our laboratory, we encountered a neuroanatomical variation. The lateral cord of brachial plexus and its branches, had a different configuration. The nerves forming the letter ‘M’ was normal right under the pectoralis minor muscle. The musculocutaneous nerve passed through the coracobrachialis muscle, and gave branches to biceps brachii and brachialis muscles. The anomalous branch of the musculocutaneous nerve originated approximately at the mid point level of the brachial region, and 2.8 cm above the distal end of deltoid tuberosity. It coursed inferiorly between the biceps and brachialis muscles about 12.6 cm and joined the median nerve 5.6 cm superior to the interepicondillary line. Giving its accessory branch and the nerve to the biceps brachii and brachialis muscle, the musculocutaneus nerve coursed normally as a lateral antebrachial cutaneous nerve. This variation has clinical importance in median nerve lesions and its distinctive diagnosis. Lesions of the median nerve, If lesion was proximal to this accessory branches, muscles and cutaneous innervations related to this branch was normal.
A Variant Course of Lateral Root of Median Nerve: Embryological Basis  [PDF]
Mumal Nagwani, Archana Rani, Anita Rani, Jyoti Chopra, Ajai Kumar Srivastava, Pradeep Kumar Sharma
Asian Journal of Medical Sciences , 2014, DOI: 10.3126/ajms.v5i2.8195
Abstract: 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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