Brachial Anatomy

Question 1

R. and L. Deltoid

Answer 1

Muscle that runs over the shoulder. Inserts on the deltoid tuberosity.

Question 2

R. and L. Pectoralis Minor

Answer 2

Muscle that runs from ribs 3-5 to the superior surface of the coracoid process

Question 3

R. and L. Biceps Brachii (long and short heads)

Answer 3

Short head originates on the acromion process, long head on the supraglenoid tubercle of the scapula. Insert on the radial tuberosity and bicipital aponeurosis. Flexes and supinates.

Question 4

R. and L. Coracobrachialis

Answer 4

Muscle that originates on the scapula and inserts on the humerus in line with the lesser tubercle. Flexes and adducts.

Question 5

Brachioradiallis

Answer 5

Originates on the humerus and inserts on the radius

Question 6

Brachialis

Answer 6

Originates on the distal half of the humerus and inserts on the ulnar tuberosity.

Question 7

Bicipital Aponeurosis

Answer 7

Flat sheet of connective tissue that runs over the cubital region.

Question 8

R. and L. Radial Nerve

Answer 8

Nerve that runs down the lateral side of the arm and innervates the radial side. Branch off of the posterior cord.

Question 9

R. and L. Ulnar Nerve

Answer 9

Nerve that runs down the medial side of the arm. Branch off of the medial cord.

Question 10

R. and L. Axillary Nerve

Answer 10

Nerve that innervates that axillary region, including the deltoid. Branch off of the posterior cord.

Question 11

R. and L. Median Nerve

Answer 11

Nerve that innervates the palm and runs through the carpal tunnel. Formed from both the lateral and medial cords.

Question 12

R. and L. Musculocutaneous Nerve

Answer 12

Nerve that innervates the coracobrachiallis and biceps brachii.

Question 13

R. and L. Medial Cutaneous Nerve

Answer 13

Thin branch off of the medial cord. Senses on the medial portion of the arm.

Question 14

R. and L. Brachial Artery

Answer 14

Artery that runs down the medial side of the arm along the biceps brachii muscle.

Question 15

R. and L. Deep Brachial Artery

Answer 15

Branches off the brachial artery near the middle of the humerus. Splits into radial and middle collateral arteries.

Question 16

R. and L. Superior Ulnar Collateral Artery

Answer 16

Superior branch off of the brachial artery that vascularizes the medial arm.

Question 17

R. and L. Inferior Ulnar Collateral Artery

Answer 17

Inferior branch off of the brachial artery that vascularizes the medial arm.

Question 18

R. and L. Basilic Vein

Answer 18

Vein that runs down the medial side of the arm both proximally and distally to the elbow. Joins the axillary vein.

Question 19

R. and L. Cephalic Vein

Answer 19

Vein that runs down the lateral side of the arm. Runs up the entire arm, between pectorals major and the deltoid, and joins the axillary vein.

Question 20

R. and L. Brachial Vein

Answer 20

Runs the length of the arm, dives deep after branching with basilic vein

Question 21

R. and L. Median Cubital Vein

Answer 21

Vein junction that connects the basilic vein to the cubital vein medially to laterally. Used to inject substances.

Question 22

Anterior Deltoid

Answer 22

Originates on lateral third of clavicle, flexes shoulder

Question 23

Middle Deltoid

Answer 23

Originates on the acromion process. Abducts shoulder.

Question 24

Posterior Deltoid

Answer 24

Originates on the scapula spine. Extends shoulder.

Question 25

Anterior Circumflex Humeral Artery

Answer 25

Artery that branches off the brachial artery and goes around the surgical neck of the humerus.