ABSTRACT
Background: Brachialis is a muscle of anterior compartment of arm. It has two heads. Superficial head insertinginto ulnar tuberosity innervated by musculocutaneous nerve, the deep head inserts into coronoid process ofulna and supplied by radial nerve. Neuromuscular compression due to presence of additional slip of brachialisforms the basis of this study.Materials and methods: Study was done in 60 adult human cadaveric upper limbs of both the sides irrespectiveof sex in the Department of Anatomy, Kempegowda institute of medical sciences (KIMS), Bangalore and othermedical colleges nearby. Presence of additional slips of brachialis with important and interesting relations wasfound which were comparable with previous studies. As qualitative method was done, Descriptive statisticswere utilized.Results: Additional slips were present in 21.6%. It was found mainly in the left upper limbs in 69.2% and rest30.7% are present in right side limbs. Among 13 specimens, additional slips originated mainly from theanteromedial aspect in 84.6% and in 15.3% it originated from the anterolateral aspect of main brachialis.Additional slips were innervated mostly by the musculocutaneous nerve in 69.2%, median nerve in 15.3% andradial nerve in 7.6%. No innervation was observed in one specimen.Conclusion: Knowledge of additional slips and its origin and course is very important for identifying the causefor neurovascular symptoms due to compression of neurovascular structures
ABSTRACT
Back ground: Suprascapular notch (SSN) is present along the superior border of the scapula. It is bridged by the supascapular ligament. Suprascapular nerve passes inferior to it. Suprascapular nerve entrapment frequently occurs at the suprascapular notch. A narrow notch or the ossified suprascapular ligament is the frequently encountered culprits. Aim: To study the morphology of suprascapular notch among 176 dry scapulae. Materials and Method: The study was conducted on 176 adult dry human scapulae in the department of Anatomy, KIMS, Bangalore. Among 176 scapulae 88 were right sided & 88 left sided. Various shapes of scapular notches were noted & classified into 6 types based on Rengachary classification. Results: The most common type of suprascapular notch in the study is Type II (R-24, L-37) & least common is Type VI (R-5, L-5). Suprascapular notch was absent in 8 Scapulae. Conclusion: We could find all the 6 types of scapular notches, most common type being type II ((34.65%) and least common type - type VI. This study is an attempt to know the various shapes of suprascapular notch.