Flashcards in Unit 1: Lecture 12 Deck (16):
The arm is sometimes referred to as the...
The bulk of the arm is formed by four muscles (innervations in parenthesis):
- biceps brachii (musculocutaneous)
- brachialis, 2 heads (musculocutaneous)
- coracobrachialis (musculocutaneous)
- triceps brachii, 3 heads (radial nerve)
Muscles of arm are organized by a deep fascia which is continuous with axillary fascia, called...
Medial brachial cutaneous nerve (from medial cord) innervates...
skin of arm
Medial antebrachial cutaneous nerve (from medial cord) innervates...
skin of forearm
Posterior surface of the arm is supplied by the...
posterior brachial cutaneous nerve, which is a branch of the radial nerve
Lateral and anterolateral surfaces of the arm supplied by...
superior and inferior lateral brachial cutaneous nerves (branches of axillary and radial nerves, respectively)
Skin of shoulder is also supplied by the...
superior lateral brachial cutaneous nerve
Biceps tendon of the long head of the biceps brachii runs in the _________ and is held in place by the ________ bridging the intertubercular groove
intertubercular groove; transverse humeral ligament
Directly beneath the belly of the biceps brachii is the distal extension of the __________, the __________
axillary artery; brachial artery
The brachial artery begins at....
the lower border of the teres major
The brachial artery courses along the _______ aspect of the arm in a thickening of the brachial fascia called the _________
medial; medial intermuscular septum
Branches of brachial artery (2)
- muscular branches (supply anterior compartment of arm; biceps brachia, the brachialis, and coracobrachialis)
- Profunda brachii (supplies triceps, and runs w/ radial nerve around the back of the shaft of the humerus)
- runs w/ brachial artery, and lateral to the artery before elbow. After elbow, they cross and median nerve is more medial
- two in number, located medially & laterally
- run with basilic vein to form the axillary vein at lower border of teres major