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Upper Arm Muscles
Origins, insertions, innervation, action, and blood supply of upper Arm muscles
20
Anatomy
Graduate
09/11/2011

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Term
Biceps brachii: origin
Definition
long head: supraglenoid tubercle of scapula
short head: tip of coracoid process of scapula
Term
Biceps brachii: insertion
Definition
radial tuberosity, fascia of forearm via bicipital aponeurosis
Term
Biceps brachii: innervation
Definition
musculocutaneous n. (C5,C6)
Term
Biceps brachii: action
Definition
flexes and supinates forearm
flexes arm when forearm is fixed
Term
Biceps brachii: blood supply
Definition
muscular branches of brachial a.
Term
Coracobrachialis: origin
Definition
tip of coracoid process of scapula
Term
Coracobrachialis: insertion
Definition
middle 1/3 of medial surface of humerus
Term
Coracobrachialis: innervation
Definition
musculocutaneous n. (C5,C6,C7)
Term
Coracobrachialis: action
Definition
flexes and adducts arm
Term
Coracobrachialis: blood supply
Definition
muscular branches of brachial a.
Term
Brachialis: origin
Definition
distal half of anterior surface of humerus
Term
Brachialis: insertion
Definition
coronoid process and tuberosity of ulna
Term
Brachialis: innervation
Definition
musculocutaneous n. (C5,C6)
Term
Brachialis: action
Definition
flexes forearm
Term
Brachialis: blood supply
Definition
radial recurrent a.
muscular branches of brachial a.
Term
Triceps brachii: origin
Definition
long head: infraglenoid tubercle of scapula
lateral head: upper half of posterior humerus
medial head: distal 2/3 of medial and posterior humerus
Term
Triceps brachii: insertion
Definition
posterior surface of olecranon process of ulna
Term
Triceps brachii: innervation
Definition
radial n. (C6,C7,C8)
Term
Triceps brachii: action
Definition
extends forearm, long head stabilizes head of abducted humerus
Term
Triceps brachii: blood supply
Definition
branch of profunda brachii a.
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