The arm and forearm Flashcards
Branches of the Brachial Artery
Profunda Brachii (Deep brachial artery)
Superior Ulnar Collateral
Inferior Ulnar Collateral
Branches of the Profunda Brachii (Deep brachial artery)
Posterior descending branch (= middle collateral)
Anterior descending branch (= radial collateral)
Anterior (Flexor) Compartment Muscles
Biceps Brachii (long and short head)
Brachialis
Coracobrachialis
Innervation of the Anterior (Flexor) Compartment
Musculocutaneous Nerve
Proximal attachment of long head of biceps brachii
Supraglenoid tubercle of scapula
Proximal attachment of short head of biceps brachii
Coracoid process of scapula
Distal attachment of Biceps Brachii
Radial tuberosity and fascia of forearm via bicipital aponeurosis
Actions of Biceps Brachii
Supinates forearm, when supine will flex forearm
Resists dislocation of shoulder (short head)
Blood supply to Biceps Brachii
Brachial artery
Innervation of Biceps Brachii
Musculocutaneous nerve (C5, C6)
Proximal attachment of Coracobrachialis
Coracoid process of scapula
Distal attachment of Coracobrachialis
Middle 1/3 of medial humeral surface
Actions of Coracobrachialis
Flexes and adducts arm at shoulder joint
Resists dislocation of shoulder joint
Blood supply to Coracobrachialis
Brachial artery
Innervation of Coracobrachialis
Musculocutaneous nerve (C5, C6, and C7)
Proximal attachment of Brachialis
Distal 1/2 of anterior surface of humerus
Distal attachment of Brachialis
Coronoid process and tuberosity of ulna
Actions of Brachialis
Flexes forearm at elbow joint
Blood supply of Brachialis
Brachial artery
Innervation of Brachialis
Musculocutaneous nerve (C5, C6) Lateral portions may receive radial nerve contributions
Posterior (Extensor) Compartment Muscles
Triceps Brachii (Long, Lateral, and Medial heads) Anconeus
Innervation of Posterior (Extensor) Compartment
Radial Nerve
Proximal attachment of Anconeus
Lateral epicondyle of humerus
Distal attachment of Anconeus
Lateral surface of olecranon, superior part of surface of ulna