Muscles of the Upper Extremity: Muscles of the Arm

Question 1

Biceps Brachii Proximal Attachment

Answer 1

Short head: Coracoid process

Long head: Supraglenoid tubercle of the scapula

Question 2

Biceps Brachii Distal Attachment

Answer 2

Radial tuberosity and bicipital aponeurosis

Question 3

Biceps Brachii Innervation

Answer 3

Musculocutaneous n. [C5,*C6]

Question 4

Biceps Brachii Action

Answer 4

Flexes the elbow
Supinates the forearm
Long head assists with:
-Shoulder flexion
-Shoulder abduction

Question 5

Brachialis Proximal Attachment

Answer 5

Distal half of the anterior surface of the humerus

Question 6

Brachialis Distal Attachment

Answer 6

Tuberosity and coronoid process of ulna

Question 7

Brachialis Innervation

Answer 7

Musculocutaneous n. [C5,*C6]

Question 8

Brachialis Action

Answer 8

Flexes the elbow

Question 9

Triceps Brachii Proximal Attachment

Answer 9

Long head: Infraglenoid tubercle of the scapula
Lateral head: Posterolateral surface of the humerus above the radial groove
Medial head: Posterior surface of the humerus below the radial groove

Question 10

Triceps Brachii Distal Attachment

Answer 10

Olecranon process

Question 11

Triceps Brachii Innervation

Answer 11

Radial n. [C6,*C7,C8]

Question 12

Triceps Brachii Action

Answer 12

Extends the elbow
Long head assists with:
-Shoulder extension
-Shoulder adduction

Question 13

Anconeus Proximal Attachment

Answer 13

Lateral epicondyle of the humerus

Question 14

Anconeus Distal Attachment

Answer 14

Lateral side of the olecranon process and proximal ulna

Question 15

Anconeus Innervation

Answer 15

Radial n. [C6,C7,C8]

Question 16

Anconeus Action

Answer 16

Extends the elbow