Head Of Biceps Brachii Muscle Research Articles

Accessory heads of biceps brachii muscle its embryogenesis and clinical implications: Cadaveric study.

Biceps brachii is an elongated two-headed fusiform muscle of the anterior compartment of the arm which crosses the shoulder as well as the elbow joint. It assists in flexion of the shoulder joint and elbow joint and powerful supinator of the forearm. It also assists in the abduction of the shoulder joint. Accessory heads of biceps brachii muscle not only give additional strength to the joints, at the same time, they may also simulate soft-tissue tumors that can result in neurovascular compression. Accordingly, the aim of this study was designed to evaluate the prevalence of accessory heads of biceps brachii muscle in human cadavers. This study was conducted on 107 formalin embalmed human cadavers (male 62 and 45 female), and dissections were performed in accordance with the institutional ethical standards and the Indian Anatomy Act. Out of 107 cadavers, three-headed biceps brachii was noted in 18 cadavers (16.82%) associated with the unusual course of musculocutaneous nerve. Rare and unusual unilateral five-headed biceps brachii was noted in one male cadaver (0.93%). All accessory heads noted in this study were supplied by the separate branches of musculocutaneous nerve except the humeral head of five-headed biceps, which was supplied by the radial nerve. Awareness of these anatomical variations, knowledge is necessary for radiologists, anesthetists, physiotherapists, and orthopedic surgeons to avoid complications during various radiodiagnostic procedures or surgeries of flexor deformities of the upper arm and forearm.

Anatomical and Morphological Variations in Supernumerary Third Head of Biceps Brachii Muscle in Human Cadavers and its Clinical Significance

Introduction: The biceps brachii muscle takes its name from its two proximally attached ‘heads’. On rare occasions, an anomalous third head arises from the superomedial part of the brachialis and is attached to the bicipital aponeurosis and the medial side of the tendon of insertion. The slip frequently descends in front of and behind the brachial artery and often causes compression of the median nerve or brachial artery. Aim: To calculate incidence of the supernumerary third head of the biceps brachii along with its anatomical and morphological variations to establish its clinical significance. Materials and Methods: The observational study was conducted in Department of Anatomy, Dr. Kiran C Patel Medical College and Research Institute, Bharuch, Gujarat, India, from October 2021 to September 2022. It included 32 cadaveric upper limbs- 16 right-sided and 16 left-sided. The morphometric measurements were done with the use of digital vernier caliper. The findings were photographed and recorded. The mean and standard deviation deviation were hereby presented and analysed by Statistical Package for Social Sciences (SPSS) version 19.0. Results: The biceps brachii was constituted of supernumerary third head in three (9.375%) limbs, one on the right and two on the left-side. In all cases, third head arose from the anteromedial aspect of the mid-humeral shaft; medial to the brachialis and inserted together with the other two heads of the biceps into bicipital aponeurosis and radial tuberosity. The mean length and mean width of the supernumerary head was measured as 141.16±43.63 mm, 25.22±4.99 mm, respectively. A significant difference was not found when compared for symmetrical sides. Conclusion: Three specimens of upper limb were observed with distinct occurrence for the third head with the incidence of 9.37% and predominance on the left-side. In case of various arm surgical procedures knowledge can be used to avoid injuries.

Six Asymmetric Bilateral Additional Heads Of Biceps Brachii Muscle Observed in a Cadaver

Six Asymmetric Bilateral Additional Heads Of Biceps Brachii Muscle Observed in a Cadaver

Revisited Anatomy of Additional Heads of Biceps Brachii Muscle and Coexisting Musculocutaneous Nerve Variants

Revisited Anatomy of Additional Heads of Biceps Brachii Muscle and Coexisting Musculocutaneous Nerve Variants

High incidence of a third head of biceps brachii in females

Incidence rates of a third head of biceps brachii muscle have been shown to vary based on race, sex, and side of the body. Traditionally, males were thought to have higher incidences than females, and the right limb was thought to most frequently contain an additional head of biceps brachii. Additionally, innervation of this third head has been unclear, with musculocutaneous nerve, median nerve, or a combination of both providing nerve supply. Here we present findings of the dissection of 23 cadavers (n = 46 limbs), in which 6 limbs demonstrated a third head of biceps brachii. Of the 6 limbs with a third head, 3 were left and 3 were right limbs, with one cadaver having the extra muscle head bilaterally. Incidence rates in females in the current study were observed to be higher than expected (20.8%), while males showed a 4.5% occurrence. All 6 of the additional heads of biceps brachii observed were innervated by musculocutaneous nerve. Together these data show a higher than expected number of female cadavers with a third head of biceps brachii, equal incidence between sides of the body, and uniform innervation by musculocutaneous nerve. These findings challenge our traditional understanding of the third head of biceps brachii and suggests a need for additional study of this complex anatomical variation.

A Rare Anomaly of the Long Head of the Biceps Brachii Muscle

Introduction: Biceps brachii is a muscle of arm which brings about supination when fore-arm is flexed and flexion of elbow joint. Proximally it is attached with two heads: long and short heads.Case report: The absence of long head of biceps brachii muscle is very rare anomaly. It may be unilateral or bilateral with or without other congenital anomalies. The exact prevalence of this anomaly is unknown. This anomaly has been reported to occur as the result of an insult to the fetus during the sixth or seventh week of gestation, at which time the long head of the biceps tendon is developing. J-GMC-N | Volume 11 | Issue 01 | January-June 2018, Page:56-57

Anomalous Third Head of Biceps Brachii Muscle and its Variant Insertion Compresses Surrounding Neurovascular Structure: A Rare Case Report

Biceps brachii (BB) is one of the muscles which are subjected to many variations. Recently, there is a lot of information about variations in origin but also some cases are reported on variations in insertion of BB. Presented herein was a case of BB muscle having both variant origin and insertion in the same muscle. The variant origin of BB was long and large at its third head (10.2 cm width and 4.9 cm breadth) which arises from mid-shaft of the humerus. More significantly, the medial portion of the head covers and conceals the lower portion of median nerve and brachial artery as an arch which continues medially to be inserted to the medial epicondyle of the humerus. We discuss in this report, the possible mechanism for neurovascular compression by this abnormal third head of BB muscle and the variation of BB from its origin and insertion. Understanding these variations is highly significant in surgical procedures around elbow joint and upper arm and it also pave the way for the differential diagnosis in nerve entrapment syndrome.

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

The numerical analysis of laminated composite plates and shells resting on nonlinear elastic foundation is the main topic of the paper. The generalized differential quadrature (GDQ) technique and the Newton-Raphson iteration are employed to obtain the solution of the static problems under consideration. The nonlinear elastic foundation is modeled using the Winkler-Pasternak model embedded with quadratic and cubic nonlinearities in order to a have a more complete description of the interaction. The structural behavior is modeled by means of higher-order displacement fields developed in the framework of a unified formulation. Several lamination schemes are studied. The class of sandwich structures with an inner soft-core is also taken into account with the help of the Murakami’s function, which correctly captures the so-called zig-zag effect. The presented approach can deal with doubly-curved surfaces characterized by two radii of curvature that can vary in each point of the reference domain, whereas most of the examples available in the literature considers only shells with constant curvature, such as spherical and cylindrical shells. Solutions are presented in terms of through-the-thickness variations of strains, stresses, and displacements. For these purposes, a posteriori recovery procedure based on the GDQ method is introduced. The accuracy and effectiveness of the proposed approach are proven by means of the comparison with the numerical results obtained by a three-dimensional finite element model.

Unilateral absence of short head of the biceps brachii in human cadaver: A case study

Anatomical variation in the head of biceps brachii is well documented in various studies in the past. As for our best knowledge with the previous publication, there are so many journals reported with multiple variation including accessory heads of biceps brachii muscle (BBM), but the absence of one head of BBM in unilateral arm is very rare. The proximal tendons of the biceps brachii are commonly involved in pathological processes and are a frequent cause of anterior shoulder pain. Disorders of the distal biceps brachii tendon typically result from partial and complete tears of the muscle. Partial tears are usually characterized by enlargement and abnormal contour of the tendon. The purpose of this study was to find some rare kind of variations in the head of biceps brachii with future enlightenment in its potential effects in the normal functioning of upper limb. In the present study, we found that absence of one head of BBM in unilateral arm of one cadaver during anatomical dissection at Windsor University School of Medicine, Brightons Estate, Cayon, P. O. Box-1621, St. Kitts and Nevis, West Indies. Strong evidence of the absence of one head of BBM may be suggestive of developmental anomaly or physical degeneration of the muscle which may lead to complete or partial dysfunction of the region (Szpinda, et al. 2013). However, further studies can reveal the real case of it.

An anatomical study of the third head of biceps brachii muscle and its innervations

Introduction: Biceps brachii muscle is the double headed flexor muscle of anterior compartment of arm, showing most common anatomical variation. Objective: To study the morphological variation of biceps brachii muscle along with its innervations. Method: 42 upper extremities of 21 formalin fixed cadavers used during routine dissection in anatomy department of LMC were studied. Biceps brachii muscles were examined for their attachments, number of heads of origin, level of fusion of muscle bellies and innervations. Appropriate photographs were taken. Result: Out of 42 upper extremities of 21 cadavers third head of biceps brachii muscle was found in two right upper extremities (9.52%). One of the specimens had dual nerve supply from musculocutaneous and median nerve where as in another specimen third head was innervated only by musculocutaneous nerve. Conclusion: Knowledge of additional head of biceps brachii is important for surgery of the fracture of shaft of humerus.

Analysis of the Morphological Variations between Musculocutaneous Nerve and Median Nerve-A cadaveric study

Background: Musculocutaneous nerve, a branch from the lateral cord of brachial plexus supply the muscles of the front of the arm. Musculocutaneous nerve has frequent variations in arm. Aim: To analyze the morphological variations between musculocutaneous nerve and median nerve in the arm. Materials and Method: 56 upper limbs belonging to 28 embalmed cadavers (M: F: 20:8) donated over last 3 years in the Anatomy Department, SMIMER Medical Collage, Surat were utilised for this study. The dissections of the upper limbs were performed as per Cunningham’s manual. The variations and/ communications between musculocutaneous nerve and median nerve if any were identified and documented. Results: Variations were encountered in 12 (21.43%) out of 56 upper limbs of the present study. In 6 upper limbs below the coracobrachialis, musculocutaneous nerve and median nerve showed communicating rami. In 1 upper limb musculocutaneous nerve was giving larger communication to median nerve as third root. In 2 upper limbs medial cord formed the median nerve and fibres from musculocutaneous nerve join the median nerve as lateral root below coracobrachialis. In 1 upper limb musculocutaneous nerve completely fused with median nerve after supplying coracobrachialis. In 2 upper limbs muculocutaneous nerve was absent and median nerves was supplying the flexor muscles of the arm and were associated with the 3rd head of biceps brachii muscle. Conclusion: The data obtained from the study were in the mid-range of previous studies. Awareness regarding such variations as well as communications is important for surgeons, orthopaedics and anaesthetist that are treating the lesions of shoulder and arm region. Keywords: Musculocutaneous Nerve, Median Nerve, Communication Branch (Ramus), Coracobrachialis Muscle

Coexistence of a pectoralis quartus muscle, a supernumerary head of biceps brachii muscle and an accessory head of flexor digitorum profundus muscle

Although anatomical variations in the upper limb are frequent, coexistence of multiple combined variations is rare. During a routine educational dissection at Jeju National University Medical School, three muscular variations were found in a 75-year-old Korean male cadaver, in which a supraclavicular cephalic vein was also found in ipsilateral upper extremity during skinning. Here we describe cha- racteristics of the pectoralis quartus muscle, the supernumerary head of biceps brachii muscle and an accessory head of flexor digitorum profundus muscle, and discuss their coexistence from morphological and embryological points of view.

Accessory head of biceps brachii muscle in North Indian cadavers

Abstract Background and aims : The biceps brachii is the large muscle of flexor compartment of arm. Normally it arises by two heads (long head and short head) and gets insertion in two parts (tendinous part and aponeurotic parts). The biceps brachii muscle is well known for variation in its origin. These variations can cause compression of brachial artery and median nerve which may pass deep to the accessory head of biceps brachii muscle, and can create problems for surgeons. So the surgeons should keep in mind such variations of biceps brachii muscle. The present study is to find out the variations in the origin of biceps brachii muscle. Material and methods: The present study was conducted in the department of anatomy of Gian Sagar Medical College, Ramnagar, Rajpura district Patiala (Punjab). In this study 32 human cadaveric limbs which were embalmed and fixed in 10% formaldehyde solution were used and these limbs were dissected and variations in origin of the biceps brachii muscle were noted. Results : Out of 32 limbs, 3 limbs (9.38%) were having three heads of biceps brachii muscle in its origin. The variations were found in the right limbs only. Conclusions : The knowledge of accessory head of biceps brachii muscle is important for the surgeons and troumatologists because there can be iatrogenic injury to the third head of biceps brachii muscle.

Anthropometric study of bicipital groove and its clinical implication

Objective: Bicipital groove along with the transverse humeral ligament bridging it offers stability and smooth functioning of the tendon of long head of biceps brachii muscle and prevents its subluxation during multidirectional biomechanical movements of arms. Hence, various anatomical information of the bicipital groove is vital as deformities of the bicipital tendon and its synovial sheath have been associated with a variety of reasons of shoulder pain and disability. Therefore, an attempt is made in this study to determine the length, width, and depth of bicipital groove along with the transverse diameter, anterior-posterior diameter and length of the humerus. Materials and Methods: The study was carried out on 60 unpaired dry humeri (right = 33, left = 27). The length, depth and width of the bicipital groove were measured using the vernier caliper. Results: The mean length, width and depth of the bicipital groove in the present study were 7.41, 1.08 and 0.55 cm. The mean length, width and A-P diameter of the humerus in the present study were 30.4, 3.0 and 2.6 cm. In the present study, the mean length of the bicipital groove corresponded to 24.37% of the total length of humerus, the mean width was 36% of the total humeral width, and the mean depth was 21.1% of the total anteroposterior width of the humerus. There was no significant correlation between right and left side as P > 0.05. Conclusion: This study determined the morphometric parameters of the bicipital groove and will be important for anthropologists, orthopedic surgeons, and clinical anatomists.

Accessory head of biceps brachii muscle in North Indian cadavers

Background and aims : The biceps brachii is the large muscle of flexor compartment of arm. Normally it arises by two heads (long head and short head) and gets insertion in two parts (tendinous part and aponeurotic parts). The biceps brachii muscle is well known for variation in its origin.These variations can cause compression of brachial artery and median nerve which may pass deep to the accessory head of biceps brachii muscle, and can create problems for surgeons. So the surgeons should keep in mind such variations of biceps brachii muscle.The present study is to find out the variations in the origin of biceps brachii muscle. Material and methods: The present study was conducted in the department of anatomy of Gian Sagar Medical College, Ramnagar, Rajpura district Patiala (Punjab). In this study 32 human cadaveric limbs which were embalmed and fixed in 10% formaldehyde solution were used and these limbs were dissected and variations in origin of the biceps brachii muscle were noted. Results : Out of 32 limbs, 3 limbs (9.38%) were having three heads of biceps brachii muscle in its origin. The variations were found in the right limbs only. Conclusions : The knowledge of accessory head of biceps brachii muscle is important for the surgeons and troumatologists because there can be iatrogenic injury to the third head of biceps brachii muscle.

English

The present case report describes the variance in the course of palmar cutaneous branch of median nerve along with a variant head of biceps brachii muscle in a middle aged male cadaver during routine dissection of right & left upper limb respectively. In the course of palmar cutaneous branch of median nerve it was observed that it was originating approx. 3cm proximal to flexor retinaculum and passed beneath the flexor retinaculum instead of passing superficial to it as described in conventional anatomical textbooks. Along with it, the third head of biceps brachii was found to originate from shaft of humerus from superomedial part of brachialis and its lower end was attached to lower part of muscle belly.

English

Several studies have described the biceps brachii muscle as one of the muscles in the upper limb with most frequent anatomical variations. They also reported the presence of this anomaly in varying frequency in different populations. The aim of this study was to assess the anatomical description of the third head of biceps brachii muscle and its abnormal innervation in human autopsies which would be of value for the surgical approach in the arm. Forty arms (20 cadavers) were dissected. The upper arm and axilla region of all cadavers were dissected carefully, then the biceps brachii muscle and surrounding structures were clearly demonstrated to show any muscle variations and abnormalities of its nerve supply, then different photographs were collected. The present study demonstrated the third head of the biceps brachii muscle in 6 out of 40 specimens (15%). The third head of biceps brachii was dominant in the right arm (4 specimens) in contrast to two specimens in the left arms and the muscle was innervated by the median nerve instead of normal innervations by the musculocutaneous nerve. In conclusion, the present study of anatomical variations of the biceps brachii muscle in the arm may contribute to a better developmental understanding and surgical approach.   Key words: Biceps brachii, anatomical variation, median and musculocutaneous nerves, human autopsy.

English

Introduction:Biceps brachii is a muscle of the anterior compartment of arm, which is a flexor and supinator of the forearm, having two heads: short head and long head. The aim of this report is to discuss a rare case of bicep brachii muscle merging with medial intermuscular septum. Case report:During a routine dissection class held for medical students, we came across an unusual unilateral variation in the right arm of a male cadaver aged about 50 years. A tendinous slip or cord was arising from the medial surface of the proximal part of short head of biceps brachii muscle and its tendon. The accessory tendon emerged from the medial side of right biceps brachii muscle, and after crossing the brachial artery and median nerve it blended with the upper part of medial intermuscular septum. This variant tendon was very thick and was tense enough to compress the structures passing deep into it. Discussion:During certain arm movements, compression of brachial artery and median nerve may lead to various neurovascular syndromes. Such accessory tendons can also be used for tendon grafts and can be obtained with ease because of its superficial position in the arm. Conclusion:This case report can be useful for clinicians attending patients of neurovascular compression syndromes in upper limb and surgeons performing tendon grafts.

Incidence of the third head of biceps brachii in population of Andhra Pradesh

Abstract Background and aims : The biceps brachii is a large fusiform muscle in the flexor compartment of the arm. In terms of the number and morphology of its head, the biceps brachii muscle is one of the most variable muscles in human body. The present study explores the importance of such variations. Materials and methods: The upper limbs of embalmed human cadavers (fixed in 10 % formaldehyde solution) were included in present study. Total 36 (72 upper limbs) cadavers were studied by dissection. Results: Among the 72 superior extremities studied, six (8.33%) arms were found to have a three- headed biceps brachii muscles. The variation was present in the left arm of four males and one female. The variation was present in the right arm of one male. Conclusion : Presence of third head of biceps brachii muscle might increase its kinematics. Supernumerary heads of biceps brachii muscle may become significant in pre-operative procedure and during surgery of upper limb.

The Third Head of Biceps Brachii Muscle in Korean: Anatomical Study

The goal of this study was to investigate the incidence of third head of biceps brachii (THBB) for understanding unexpected cases in clinical practice. The sample consisted of 214 upper extremities from 107 adult cadavers donated to science (70 males and 37 females; age, 51-87 years). Cases with pathological changes or trauma to the upper limbs were excluded. THBB was found in 14 of the 214 upper extremities. The incidence of variation was approximately 6.5%. THBB was found in 10 male limbs and 4 female limbs, and none of the cases was bilateral. THBB was a flat muscular belly-like structure that originated from the anteromedial surface of the humerus between the insertion of the coracobrachialis and the origin of the brachialis. This finding may be clinically important because the musculocutaneous nerve is subjected to compression by the bulky third head.