Scalenes/Brachium

Question 1

Anterior Scalenes PA

Answer 1

TP C3-C6

Question 2

Anterior Scalenes DA

Answer 2

1st rib

Question 3

Anterior Scalenes Actions

Answer 3

Lateral flexion of neck
1st rib elevation during forced inhalation

Question 4

Anterior Scalenes Innervation

Answer 4

Cervical Spinal Nerves C4-C6

Question 5

Middle Scalenes PA

Answer 5

TP C5-C7

Question 6

Middle Scalenes DA

Answer 6

1st rib

Question 7

Middle Scalenes Action

Answer 7

Lateral flexion of neck
Elevation of 1st rib during forced inhale

Question 8

Middle Scalenes Innervation

Answer 8

Anterior rami of cervical spinal nerves

Question 9

Posterior Scalenes PA

Answer 9

TP C5-C7

Question 10

Posterior Scalenes DA

Answer 10

2nd rib

Question 11

Posterior Scalenes Action

Answer 11

Lateral flexion of neck
Elevation of 2nd rib during forced inhale

Question 12

Posterior Scalenes Innervation

Answer 12

Anterior rami of spinal nerves C7-C8

Question 13

Biceps Brachii PA

Answer 13

Short Head: Coracoid Process
Long Head: Supraglenoid tubercle of scapula

Question 14

Biceps Brachii DA

Answer 14

Radial tuberosity
forearm fascia via bicipital aponeurosis

Question 15

Biceps Brachii Action

Answer 15

Forearm SUPINATION (main!)
Elbow flexion
Short head resists dislocation of shoulder

** main contributor to elbow flexion when forearm is supinated

Question 16

Biceps Brachii Innervation

Answer 16

Musculocutaneous Nerve (C5, C6*, C7)

Question 17

Coracobrachialis PA

Answer 17

Coracoid Process

Question 18

Coracobrachialis DA

Answer 18

Middle of humerus

Question 19

Coracobrachialis Action

Answer 19

flexes the shoulder (at GH joint)
adducts the shoulder (at GH joint)
resists dislocation of the shoulder

Question 20

Coracobrachialis Innervation

Answer 20

Musculocutaneous Nerve (C5, C6*, C7)

Question 21

Brachialis PA

Answer 21

distal anterior humerus

Question 22

Brachialis DA

Answer 22

ulner tuberosity
coronoid process of ulna

Question 23

Brachialis Action

Answer 23

elbow FLEXION (main)

** contributes to elbow flexion when arm is pronated

Question 24

Brachialis Innveration

Answer 24

Musculocutaneous Nerve (C5, C6, C7)

Small branch from radial nerve (C5, C7)

Question 25

Brachioradialis PA

Answer 25

Lateral supraEPIcondylar ridge of humerus

Question 26

Brachioradialis DA

Answer 26

Lateral surface of distal radius (proximal to the styloid process)

Question 27

Brachioradialis Action

Answer 27

Elbow flexion in midpronated position ("thumbs up") Assists to pronate and supinate forearm when movements are resisted or from end range **main contributor to elbow flexion when forearm is mid-pronated

Question 28

Brachioradialis Innervation

Answer 28

Radial Nerve (C5, C6*, C7)

Question 29

Triceps Brachii PA

Answer 29

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 30

Triceps Brachii DA

Answer 30

Olecranon of Ulna

Question 31

Triceps Brachii Actions

Answer 31

Elbow EXTENSION Long head resists shoulder dislocation (especially important during adduction)

Question 32

Triceps Brachii Innervation

Answer 32

Radial Nerve (C6, C7*, C8*)