scholarly journals A Unilateral Variation in Triceps Brachii Muscle Demonstrating a Fourth Head

2021 ◽  
Author(s):  
Shveta Swami ◽  
Virendra Budhiraja ◽  
Deepak Sharma ◽  
Rimpi Gupta ◽  
Swati Bansal
Keyword(s):  
Radial Nerve ◽  
Anatomical Variations ◽  
Triceps Brachii ◽  
Posterior Compartment ◽  
Medial Head ◽  
Compression Syndrome ◽  
Male Cadaver ◽  
Triceps Brachii Muscle ◽  
The Right ◽  
Neurovascular Bundles

Abstract Introduction Triceps brachii muscle is the only muscle of posterior compartment of arm, consisting of three heads—long, lateral, and medial. Radial nerve and profunda brachii artery run in the radial groove that separate lateral and medial head. Evolutionarily, triceps has many subheads which either fused or disappeared. Therefore, the knowledge of muscle is essential anthropologically and clinically, and this study aims to study the anatomical variations of triceps brachii muscle. Case Report In the present case, during routine dissections of undergraduate MBBS students, a fourth head of origin of triceps brachii muscle was seen in a male cadaver in the right arm. The variation was seen only unilaterally in cadaver. The origin was tendinous arising from the posteromedial aspect of upper part of the shaft of the humerus close to the surgical neck above the radial groove. This tendon was arching over the neurovascular bundle containing radial nerve and profunda brachii artery. Discussion and Conclusion The variations of triceps brachii muscles are mentioned in literature but are uncommon and if tendinous fourth head is present over the neurovascular bundles, it may lead to compression syndrome. Hence, these variations are of great importance to the radiologists, surgeons, and orthopaedicians while dealing with posterior compartment of arm.

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.

AXILLARY NERVE SUPPLYING MOTOR BRANCH TO LONG HEAD OF TRICEPS BRACHII MUSCLE: A CASE REPORT AND REVIEW OF LITERATURE

2021 ◽  
pp. 69-71
Author(s):  
Giridhar Dasegowda ◽  
Seema Shimoga Rangappa
Keyword(s):  
Radial Nerve ◽  
Axillary Nerve ◽  
Extensive Literature ◽  
Triceps Brachii ◽  
Motor Branch ◽  
Traumatic Injuries ◽  
Clinical Observations ◽  
Male Cadaver ◽  
Triceps Brachii Muscle ◽  
Long Head

All three heads of the triceps brachii are classically described as being innervated by the radial nerve in the textbooks. Some clinical observations of traumatic injuries of the axillary nerve with associated paralysis of the long head of triceps and cadaveric studies have suggested that the axillary nerve may innervate the long head of triceps. During routine dissection to undergraduate M.B.B.S students, we found axillary nerve giving a motor branch to long head of triceps brachii on right side, in an adult male cadaver aged about 60 years. We conducted extensive literature search to analyse the previous studies reporting such variations and the studies conducted on the radial nerve or triceps brachii innervation pattern. This variation is clinically important for surgeons, orthopedicians and anaesthetist while performing surgeries and pain management therapies on the upper limb.

scholarly journals Bilateral variations in the roots of origin of the phrenic nerve and absence of fibrous pericardium in an old male cadaver

2016 ◽  
Vol 33 (03) ◽  
pp. 164-167
Author(s):  
S. Ahmadpour ◽  
K. Foghi
Keyword(s):  
Brachial Plexus ◽  
Phrenic Nerve ◽  
Practical Importance ◽  
Anatomical Variations ◽  
Rare Variation ◽  
Male Cadaver ◽  
Supraclavicular Block ◽  
The Right ◽  
Mediastinal Pleura

AbstractPhrenic nerve provides the major motor supply to diaphragm. Various anatomical variations in the course and distribution of the phrenic nerve have reported before. Here we report a rare bilateral asymmetric variation in the roots of origin of the phrenic nerve and absence of fibrous pericardium in an old male cadaver. Specifically, the right phrenic nerve was arising from the upper trunk of the brachial plexus (C5) and the left side nerve originated from the supraclavicular nerve and a tiny branch from C5. In the same cadaver both sides phrenic nerve were buried in the mediastinal pleura. Another interesting finding was absence of the fibrous pericardium. To the best of our knowledge the presented case showed a very rare variation in the roots of origin of the phrenic nerve accompanied with pericardial anomaly which has been less reported. We think such case is of practical importance during supraclavicular block during anesthesia

Cubital Tunnel Syndrome Caused by Abnormal Insertion of Triceps Brachii Muscle

1994 ◽  
Vol 19 (1) ◽  
pp. 38-39 ◽  
Author(s):  
S. MATSUURA ◽  
T. KOJIMA ◽  
Y. KINOSHITA
Keyword(s):  
Clinical Course ◽  
Cubital Tunnel Syndrome ◽  
Medial Epicondyle ◽  
Cubital Tunnel ◽  
Triceps Brachii ◽  
Medial Head ◽  
Triceps Muscle ◽  
Triceps Brachii Muscle ◽  
Tunnel Syndrome ◽  
Operative Findings

Some cases of cubital tunnel syndrome are caused by anatomical abnormalities such as the epitrochleo-anconeus muscle or snapping and bulkiness of the medial head of the triceps brachii muscle. We report a rare cause of cubital tunnel syndrome that has not been reported previously. It was caused by an abnormal insertion of the medial head of the triceps muscle into the medial epicondyle. The clinical course and operative findings are described.

scholarly journals Ulnar nerve contribution in the innervation of the triceps brachii muscle ulnar nerve to the triceps brachii

1970 ◽  
Vol 6 (1) ◽  
pp. 834-839
Author(s):  
DLR Silva ◽  
MP Barros ◽  
TGS Freire ◽  
L Firmino Júnior ◽  
WRB Almeida Filho ◽  
...  
Keyword(s):  
Brachial Plexus ◽  
Ulnar Nerve ◽  
Terminal Branch ◽  
Upper Limbs ◽  
Triceps Brachii ◽  
Medial Head ◽  
Muscle Innervation ◽  
Triceps Brachii Muscle ◽  
Long Head ◽  
Lateral Head

The ulnar nerve is considered the thickest terminal branch of the medial cord in the brachial plexus and most authors does not mention the possibility of this nerve emitting branches to the arm. However, some studies reported that the ulnar nerve could supply the medial head of triceps brachii muscle. The main objective in this study was identifying the presence of ulnar nerve branches in triceps brachii muscle. Sixty upper limbs of adult Brazilian corpses of both sexes were used. The estimated age was between 25 and 80 years old. Every studied piece had the nerves and their branches quantified and measured with a manual mechanic caliper. The branches were photographed and had the data registered in individual files. Were found ulnar nerve branches for all the heads of triceps brachii muscle: 1 branch (9,1%) to lateral head, 2 branches (18,1%) to long head and 8 branches (72,7%) to medial head. Thus, we can conclude that the contribution of ulnar nerve to triceps brachii muscle constitutes an important anatomical variation.Key words: Ulnar nerve; Triceps brachii muscle; Innervation.

scholarly journals Highest extent of lateral and medial heads of triceps brachii muscle

2015 ◽  
Vol 32 (02) ◽  
pp. 063-065
Author(s):  
S. Lovesh ◽  
D. Kaur ◽  
M. Jain ◽  
S. Pandey
Keyword(s):  
Shoulder Joint ◽  
Clinical Importance ◽  
Triceps Brachii ◽  
Medial Head ◽  
Accurate Knowledge ◽  
Fracture Management ◽  
Shoulder Region ◽  
Triceps Brachii Muscle ◽  
Formalin Fixed ◽  
Lateral Head

Abstract Introduction: Various studies have been done on triceps brachii muscle but the description of the highest extent of lateral and medial head of triceps brachii muscle remained unexplored that is why this study was undertaken to know the extent of their proximal attachments in relation to anatomical neck of humerus and capsule of shoulder joint. Materials and Methods: The shoulder region of 50 formalin fixed upper limbs were dissected to explore the capsule of shoulder joint to reach the highest extent of lateral & medial head of triceps brachii muscle where the nature of fibres, fleshy or tendinous was noted. Oblique and vertical distances of proximal attachment of lateral & medial head of triceps brachii muscle to the anatomical neck of humerous was measured with the help of a sliding caliper. Results: Medial head of triceps brachii muscle in all the cases was fleshy in origin while that of lateral head; fibres were fleshy and tendinous in 82% & 18% of cases, respectively. Fibres of lateral and medial head were blending with the capsule of shoulder joint in 28% & 6% of cases respectively. Maximum cases of lateral head were having their oblique and vertical distances between 21-40 mm (64% & 58% respectively) while those for medial head were >40 mm (68% & 74% respectively). Conclusion: Accurate knowledge of these anatomical patterns of triceps brachii muscle are of considerable clinical importance in the conduct of reparative open access and arthroscpic surgeries around the shoulder and the fracture management of the upper end of humerus.

scholarly journals Third Head of the Biceps Brachii Muscle and a Communication between the Musculocutaneous and Median Nerves: A Case Report

2019 ◽  
Vol 36 (01) ◽  
pp. 051-054
Author(s):  
Caroline Dussin ◽  
Lucas Moyses ◽  
Sávio Siqueira
Keyword(s):  
Case Report ◽  
Biceps Brachii ◽  
Anatomical Variations ◽  
Clinical Implications ◽  
Biceps Brachii Muscle ◽  
Present Case Report ◽  
Communicating Branch ◽  
Brachialis Muscle ◽  
Male Cadaver ◽  
The Right

AbstractMany authors have reported and classified several anatomical variations between the musculocutaneous (Mc) and median (Me) nerves, regarding their origin, number, and proximity with the coracobrachialis muscle. There also are, in the scientific community, records classifying the origin of supernumerary heads of the biceps brachii muscle. However, the occurrence of both aforementioned variations in the same arm is very uncommon. During a routine dissection of the right upper limb of a male cadaver, a third head of the biceps brachii was found originating from the fibers of the brachialis muscle, as well as a communicating branch between the Mc and the Me nerves, in the same limb. The objective of the present case report is to describe these multiple variations found, relating them and discussing their relevant clinical implications.

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.

Sign in / Sign up

Export Citation Format

Share Document