Items tagged “muscle-stub”

20 results found
Article

Muscles of the shoulder

Muscles of the shoulder can be subdivided into a variety of groups depending on origin, topography, function or innervation. The system used here groups the muscles based on their function and topography (which are closely related in the upper limb): Muscles of the shoulder girdle Muscles that...
Article

Deltoid muscle

The deltoid muscle (also known as deltoideus muscle) is the largest of the shoulder muscles. The muscle is composed of three heads (clavicular, acromial and spinous), although electromyography suggests that there are at least seven control regions that could act independently 1. Summary origin...
Article

Teres major muscle

Teres major muscle is one of the seven scapulohumeral muscles that act around the glenohumeral joint to facilitate shoulder movement. Summary origin: caudal two thirds of lateral border and inferior angle of scapula insertion: medial border of the intertubercular groove, which is the crest of...
Article

Biceps brachii muscle

The biceps brachii muscle (also known simply as biceps) is a two-headed muscle in the anterior compartment of the arm that flexes at the elbow and supinates the forearm. Summary origin short head: coracoid process of the scapula long head: supraglenoid tubercle of the scapula insertion: rad...
Article

Coracobrachialis muscle

The coracobrachialis muscle is one of the three muscles of the anterior compartment of the arm. It sits beneath the biceps brachii, inserting via a flat tendon into the medial shaft of the humerus. origin: coracoid process of scapula insertion: via a flat tendon onto the midportion of the medi...
Article

Brachialis muscle

The brachialis muscle is one of the three muscles of the anterior compartment of the arm. It is only involved in flexion at the elbow and therefore the strongest flexor at the elbow, compared with the biceps brachii which is also involved in supination because of its insertion on the radius. Su...
Article

Anconeus muscle

The anconeus muscle is a small muscle in the posterior compartment of the arm at the lateral aspect of the elbow. It has little functional significance but should be differentiated from the variably present anconeus epitrochlearis at the medial aspect of the elbow. Summary origin: lateral epic...
Article

Articularis cubiti muscle

The articularis cubiti muscle lies in the posterior compartment of the arm: origin: posterior surface of the distal humerus insertion: posterior surface of the elbow joint capsule innervation: radial nerve action: tenses the posterior elbow joint capsule during elbow extension
Article

Pronator teres muscle

Pronator teres muscle is a two-headed flexor and pronator of the forearm, found superficially in the anterior compartment of the forearm. Summary origin humeral head: medial epicondyle of the humerus ulnar head: coronoid process of the ulna insertion: lateral surface of the middle-third rad...
Article

Flexor carpi radialis muscle

Flexor carpi radialis (FCR) muscle is found in the first layer of the anterior compartment of the forearm. It does not pass through the carpal tunnel, but rather by itself in a small separate tunnel between the superficial and deep layers of the flexor retinaculum along the scaphoid and trapeziu...
Article

Palmaris longus muscle

Palmaris longus (PL) muscle is a superficial, weak flexor of the wrist located in the anterior compartment of the forearm. It is one of the extrinsic muscles of the hand. Summary origin: medial epicondyle of the humerus insertion: palmar aponeurosis arterial supply: anterior ulnar recurrent ...
Article

Latissimus dorsi muscle

Latissimus dorsi muscle (plural: latissimi dorsi muscles, and colloquially often shortened to the lats) is one of the muscles that attaches the upper limb to the vertebral column. Summary origin ​spinous processes of T7-T12 vertebrae and thoracolumbar fascia posterior third of the iliac cres...
Article

Levator scapulae muscle

Levator scapulae muscle is a muscle of the upper limb that connects the pectoral girdle to the cervical spine. Summary origin: C1-C4 transverse processes insertion: superior angle of the scapula innervation: direct branches from the C3-4 spinal nerves, and the dorsal scapular nerve (C5) art...
Article

Subclavius muscle

The subclavius muscle is a small triangular muscle of the pectoral region which depresses the shoulder. Summary origin: 1st costochondral joint insertion: subclavian groove on the inferior aspect of the clavicle innervation: nerve to subclavius arterial supply: clavicular branch of the thor...
Article

Flexor carpi ulnaris muscle

Flexor carpi ulnaris (FCU) muscle is of the first layer of the anterior compartment of the forearm. It is one of the extrinsic muscles of the hand. Summary origin humeral head: medial epicondyle of the humerus ulnar head: aponeurosis from medial olecranon and upper three quarters subcutaneou...
Article

Flexor digitorum superficialis muscle

Flexor digitorum superficialis (FDS) muscle, also known as flexor digitorum sublimis muscle, is a muscle in the second (intermediate) layer of the anterior compartment of the forearm. It splits into four tendons, passes through the carpal tunnel under the flexor retinaculum. At the level of the ...
Article

Flexor digitorum profundus muscle

Flexor digitorum profundus (FDP) muscle makes up the third layer of the anterior compartment of the forearm along with flexor pollicis longus muscle. It passes through the carpal tunnel. It is one of the extrinsic muscles of the hand. Summary origin:  medial olecranon, upper three-quarters of...
Article

Flexor pollicis longus muscle

Flexor pollicis longus (FPL) muscle is one of the two muscles that make up the third layer of the anterior compartment of the forearm along with the flexor digitorum profundus muscle. It is a deep muscle under the abductor pollicis brevis muscle. It passes through the carpal tunnel. It is one of...
Article

Pronator quadratus muscle

Pronator quadratus muscle is the most distal muscle that makes up the deepest layer of the anterior compartment of the forearm. It is one of the extrinsic muscles of the hand. Summary origin: anterior surface of distal quarter of ulnar shaft insertion: anterior surface of distal quarter of ra...
Article

Posterior compartment of the forearm

The forearm is divided into the posterior compartment and the anterior compartment by the deep fascia, lateral intermuscular septum and the interosseous membrane between the ulna and radius.  Muscles The posterior compartment of the forearm contains 11 muscles, divided into deep and superficia...

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