What is Infraspinatus Muscle? The infraspinatus is a broad triangular muscle that takes the majority of the dorsal surface of the scapula. It arises mostly from the infraspinous fossa of the scapula,& joins it to the proximal humerus. The infraspinatus is one of the 4 rotator cuff muscles, alongside subscapularis, teres minor & supraspinatus muscles. As a portion of the rotator…
What is Subscapularis Muscle ? The subscapularis is a triangular shoulder muscle situated in the subscapular fossa of the scapula. Attaching between the scapula & the proximal humerus, it is one of the 4 muscles of the rotator cuff, along with supraspinatus, infraspinatus, & teres minor. Rotator cuff muscles act to combine work for stabilization & steer the humeral head within the glenoid cavity during…
What is Supraspinatus Muscle? Supraspinatus is 1 of the rotator cuff muscles, along with infraspinatus, teres minor & subscapularis muscles. Supraspinatus is situated deeply to the trapezius muscle in the posterior scapular region, extending from the supraspinous fossa of the scapula to the proximal humerus. Together with the other rotator cuff muscles, supraspinatus work as a stabilization of the glenohumeral (shoulder) joint during the movements of the upper extremity. Additionally, it…
What is a Gracilis Muscle? The gracilis muscle is a long, thin muscle that runs along the inner thigh. It originates from the pubic bone and inserts into the tibia bone, just below the knee joint. The gracilis muscle is part of the medial compartment of the thigh muscles, along with the adductor muscles. It…
Introduction What do the knee joint ligaments? What are knee joint ligaments made of? What are the ligaments of the knee joint? Patellar ligament Oblique popliteal ligament Arcuate popliteal ligament Anterior cruciate ligament Introduction: Origin: Orientation: This runs inferiorly, medially as well as anteriorly. Insertion: Nerve Supply: Vascular Supply: Composition: Bundles: Function: Anterior Cruciate Ligament…
Introduction The pectineus is a flat muscle found in the superomedial part of the anterior thigh. The fascial part of the thigh muscles is specific in that each of them is innervated by a femoral nerve (L2, L3). Due to having a dual nerve supply, the pectineus is one of a few muscles classified into…
What is Latissimus dorsi Muscle? The latissimus dorsi muscle (‘the lats muscle’ or ‘the lats’) is the broadest muscle in the human body. It is relatively thin & covers almost all back muscles at the posterior trunk, rather than the trapezius muscle. Together with the levator scapulae, trapezius & rhomboid muscles, the latissimus dorsi relates to the superficial layer of the extrinsic…
Introduction The adductor Magnus’s muscle is a large triangular muscle of the lower limb, with its apex located on the hip bone, & it’s base on the linea aspera of the femur. It is located both in the posterior & medial fascial compartments of the thigh. The distribution of this muscle in 2 compartments is…
Introduction The Adductor longus is one of the adductor muscles of the medial thigh. Together with adductor brevis, adductor Magnus, gracilis & obturator externus, it makes up the hip adductors. This large fan-shaped muscle is located most anteriorly of this group & covers the middle part of the adductor Magnus & the anterior part of…
What is the knee joint? A knee is the modified hinge joint, a type of synovial joint, that is composed of three functional compartments: a patellofemoral articulation, consisting of a patella, or “kneecap”, as well as a patellar groove on the front of a femur through which it slides; & the medial as well as…
