Musculature of the Arms (page 3)

Flashcards detailing key muscles of the arms, their origins, insertions, and innervations.

Brachialis

Originates from the anterior distal shaft of the humerus and inserts on the coronoid process and tuberosity of ulna; innervated by musculocutaneous and radial nerves.

Brachioradialis

Originates from the lateral supracondylar ridge of the humerus and inserts on the styloid process of radius; innervated by the radial nerve.

Pronator Teres

Originates from the medial epicondyle of the humerus and the coronoid process of ulna, inserts on the lateral midshaft of radius; innervated by the median nerve.

Biceps Brachii

Has a long head that originates from the supraglenoid tubercle and a short head from the coracoid process; inserts on the tuberosity of the radius and fascia of forearm; innervated by musculocutaneous nerve.

Triceps Brachii

Has a long head that originates from the infraglenoid tubercle of the scapula and lateral and medial heads; inserts at the olecranon of ulna; innervated by the radial nerve.

Extensor Digitorum

Originates from the lateral epicondyle of the humerus and inserts on the dorsal aspect of phalanges II-V; innervated by the radial nerve.

Flexor Carpi Ulnaris

Originates from the medial epicondyle of the humerus and inserts on the pisiform, hamate, and metacarpal V; innervated by the ulnar nerve.

Deltoid

Originates from the clavicle, scapular spine, and acromion; inserts on the deltoid tuberosity of the humerus; innervated by the axillary nerve.

Coracobrachialis

Originates from the coracoid process and inserts on the medial aspect of the shaft of the humerus; innervated by the musculocutaneous nerve.

Supraspinatus

Originates from the supraspinous fossa of the scapula and inserts on the greater tubercle of the humerus; innervated by the suprascapular nerve.

Infraspinatus

Originates from the infraspinous fossa of the scapula and inserts on the greater tubercle of the humerus; innervated by the suprascapular nerve.

Teres Minor

Originates from the lateral border of the scapula and inserts on the greater tubercle of the humerus; innervated by the axillary nerve.

Subscapularis

Originates from the subscapular fossa of the scapula and inserts on the lesser tubercle of the humerus; innervated by the subscapular nerve.