The Arm

Question 1

Anterior Flexors of the Arm and their Innervation

Answer 1

Biceps brachii

Brachialis

Coracobrachialis

Innervated by musculocutaneous nerve

Question 2

Posterior Extensor of the Arm and its Innervation

Answer 2

Triceps brachii

Innervated by radial nerve

Question 3

Proximal Attachments of Biceps Brachii

Answer 3

Short head: Tip of coracoid process of scapula

Long head: supraglenoid tubercle of scapula

Held in place by transverse humeral ligament

Question 4

Distal Attachments of Biceps Brachii

Answer 4

Tuberosity of radius and fascia of forearm via bicipital aponeurosis

Question 5

Biceps Action

Answer 5

Flexion (when supinated)

Supination

Question 6

Brachialis Action

Answer 6

Flexion of the forearm

Question 7

Brachialis Distal Attachment

Answer 7

Coronoid process and tuberosity of ulna

Question 8

Brachialis Proximal Attachment

Answer 8

Distal half of anterior surface of humerus

Question 9

Coracobrachialis Action

Answer 9

Flexes arm

Adducts the arm

Stabilizes the glenohumeral joint

Question 10

Coracobrachialis Proximal Attachment

Answer 10

Tip of coracoid process of scapula

Question 11

Coracobrachialis Distal Attachment

Answer 11

Middle third of medial surface of humerus

Question 12

Triceps Brachii Proximal Attachment

Answer 12

Long Head: Infraglenoid tubercle of scapula

Lateral Head: Posterior surface of humerus, superior to radial groove

Medial Head: Posterior surface of humerus, inferior to radial groove

Question 13

Triceps Brachii Distal Attachment

Answer 13

Proximal end of olecranon of ulna and fascia of forearm

Question 14

Anconeus Proximal Attachment

Answer 14

Lateral epicondyle of humerus

Question 15

Anconeus Distal Attachment

Answer 15

Lateral surface of olecranon and superior part of posterior surface of ulna

Question 16

Anconeus Action

Answer 16

Assists triceps in extension of forearm

Stabilizes elbow joint

Question 17

What nerve accompanies the brachial artery?

Answer 17

The median nerve

Question 18

Branches of the Brachial Artery

Answer 18

Profunda brachii (posterior to humerus)

Superior ulnar collateral artery

Inferior ulnar collateral artery

Humeral nutrient artery

Question 19

The profunda brachii is accompanied by which nerve?

Answer 19

Radial nerve

Question 20

The profunda brachii ends and divides into the _______ and _______

Answer 20

Middle and radial collateral arteries

Question 21

The musculocutaneous nerve emerges lateral to the biceps and becomes the ______

Answer 21

Lateral cutaneous nerve of the forearm

Question 22

Anterior to the lateral epicondyle, the radial nerve divides into ______ and ______

Answer 22

The deep branch of the radial nerve and the superficial branch of the radial nerve

Question 23

The deep branch of the radial nerve is entirely _______, while the superficial branch is entirely _______.

Answer 23

The deep branch is entirely MUSCULAR and ARTICULAR, while the superficial branch is entirely CUTANEOUS