The Arm

Question 1

Anterior (Flexor) Compartment includes (3)

Answer 1

• biceps brachii
-long head
-short head
• brachialis
• coracobrachialis

Question 2

Biceps brachii:
Proximal Attachment
-long head:
-short head:

Answer 2

• long head: supraglenoid tubercle of scapula

- short head: coracoid process of scapula

Question 3

Biceps brachii:
Distal Attachment (2)

Answer 3

-radial tuberosity and fascia of forearm via bicipital aponeurosis

Question 4

Biceps brachii:

Actions (2)

Answer 4

• supinates forearm, when supine will flex forearm

- resists dislocation of shoulder (short head)

Question 5

Biceps brachii:

Innervation

Answer 5

• musculocutaneous nerve (C5, C6)

Question 6

Coracobrachialis:

Proximal Attachment

Answer 6

-coracoid process of scapula

Question 7

Coracobrachialis:

Distal Attachment

Answer 7

-middle 1/3 of medial humeral surface

Question 8

Coracobrachialis:

Acitons (2)

Answer 8

• flexes & adducts arm at shoulder joint

- resists dislocation of shoulder joint

Question 9

Coracobrachialis:

Innervation

Answer 9

• musculocutaneous nerve (C5, C6, C7)

Question 9

Brachialis:

Proximal Attachment

Answer 9

-distal ½ of anterior surface of humerus

Question 10

Brachialis:

Distal Attachment

Answer 10

-coronoid process and tuberosity of ulna

Question 11

Brachialis:

Actions

Answer 11

-flexes forearm at elbow joint

Question 12

Brachialis:

Blood Supply

Answer 12

• Brachial artery

Question 13

Brachialis:

Innervation (2)

Answer 13

• musculocutaneous nerve (C5, C6)

- Lateral portions may receive radial nerve contributions

Question 14

Posterior (Extensor) Compartment of the arm includes (2)

Answer 14

triceps brachii
-long head
-lateral head
-medial head
• anconeus

Question 15

Vasculature of Arm & Forearm

Continuing Path of Blood Supply From

Answer 15

Arm (brachium) into Forearm (antebrachium)