Flexor digitorum superficialis Muscle Anatomy Flexor Digitorum Superficialis is in the anterior compartment of the forearm. It is sometimes considered to be the deepest part of the superficial layer of this compartment. Origin It has 2 heads, Insertion It inserts via the four tendons attaching to the anterior surface of the middle phalanx of digits…
Palmaris longus Muscle Anatomy The palmaris longus is a muscle visible as a small tendon between the flexor carpi radialis and the flexor carpi ulnaris, although it is not always present. About 14% of people do not have it; however, communities of African, Asian, and Native American people may have different percentages. Grip strength is…
Flexor Carpi Radialis Muscle Anatomy The flexor carpi radialis muscle is a relatively thin muscle located on the anterior part of the forearm. Origin It originates from the medial epicondyle of the humerus. Insertion It inserts on the anterior aspect of the base of the second metacarpal, and has small slips to both the third…
Pronator teres Muscle Anatomy The pronator teres muscle is located on the palmar side of the forearm, below the elbow. It is a fusiform muscle found in the anterior forearm. It can be found on the front of the forearm and is a long, spherical muscle. The humeral head and the ulnar head are the…
Brachialis Muscle Anatomy The brachialis (brachialis anticus) is a muscle in the upper arm that flexes the elbow joint. It is the prime mover of elbow flexion. The brachialis actually generates about 50% more power and is thus the prime mover of elbow flexion. The brachialis is deeper than the biceps brachialis muscle and is…
Biceps brachii muscle Anatomy Biceps brachii is a two-headed muscle that lies on the upper arm between the shoulder and the elbow. Both heads arise on the scapula and join to form a single muscle belly which is attached to the upper forearm. “Capulets breve” is another term for the short head, and “capulets longum”…
Coracobrachialis Muscle Anatomy The coracobrachialis muscle is the smallest of the three muscles that start from the coracoid process of the scapula. It is located at the upper and medial part of the arm (superomedial part of the humerus- Anterior Compartment of the Arm). Muscle details The contraction of the coracobrachialis leads to two movements…
Subscapularis Muscle Anatomy A large triangular-shaped muscle which fills the subscapular fossa. The term “subscapularis” means under (sub) the scapula. It is largest and strongest muscle of the rotator cuff muscle. Origin It originates from the medial two-thirds of the subscapular fossa. Insertion It inserts into the lesser tubercle of the humerus and the front…
Teres major Muscle Anatomy The teres major muscle is one of the six muscles within the scapulohumeral muscle group. This muscle is commonly confused as a rotator cuff muscle, but it is not because it does not attach to the capsule of the shoulder joint, unlike the teres minor muscle. Origin : It originates from…
Teres Minor Muscle Anatomy The teres minor is a slim, narrow muscle within the rotator cuff, located in the shoulder. It also contributes to the rotator cuff, a capsule of muscles and tendons that collectively stabilize the glenohumeral joint. Origin It originates from the lateral border and adjacent posterior surface of the scapula. Insertion It…
