Lab Exam 2 (The elbow, wrist, and torso)

Question 1

Biceps Brachii

Answer 1

Origin- Coracoid process and supraglenoid tubercle
Insertion- radial tuberosity of radius
Action- Flexes elbow(primary when supinated); flexes shoulder; supinates radioulnar joint

Question 2

Brachialis

Answer 2

Origin-anterior-medial shaft of humerus
Insertion- coronoid process of ulna
Action- flexes elbow (primary when pronated)

Question 3

Brachioradialis

Answer 3

Origin- lateral epicondyle of humerus
Insertion- distal radius
Action- flexes elbow (primary when neutral)

Question 4

Triceps Brachii

Answer 4

Origin-Infraglenoid tubercle; posterior humerus
Insertion- olecranon process of ulna
Action- extends elbow; extends shoulder

Question 5

Pronator Teres

Answer 5

Origin- medial epicondyle of humerus
Insertion- proximal 1/3 radius
action- pronates radioulnar joint

Question 6

Supinator

Answer 6

Origin- lateral epicondyle of humerus
Insertion- proximal 1/3 radius
Action- supinates radioulnar joint

Question 7

Flexor Carpi Radialis

*wrist flexor

Answer 7

Origin- medial epicondyle of humerus
Insertion- anterior lateral hand
Action- flexes wrist; radial deviation

Question 8

Flexor Carpi Ulnaris

*wrist flexors

Answer 8

Origin- medial epicondyle of humerus
Insertion- anterior medial hand
Action- flexes wrist; ulnar deviation

Question 9

Extensor Carpi Radialis Longus & Extensor Carpi Radialis Brevis
*wrist extensor

Answer 9

Origin- lateral epicondyle of humerus
Insertion- posterior lateral hand
Action- Extends wrist; radial deviation

Question 10

Extensor Carpi Ulnaris

*wrist extensor

Answer 10

Origin- lateral epicondyle of humerus
Insertion- posterior medial hand
Action- Extends wrist; ulnar deviation

Question 11

Diaphragm

Answer 11

Origin- Xiphoid process; lower 6 ribs; L1-L4 vertebrae
Insertion- central tendon
Action- Inspiration

Question 12

External Intercostals

Answer 12

Origin- superior rib
Insertion- inferior rib
Action- elevates rib

Question 13

Internal Intercostals

Answer 13

Origin- inferior rib
Insertion- superior rib
Action- depresses rib

Question 14

Erector Spinae

Answer 14

Action- trunk extension

Question 15

Rectus Abdominis

Answer 15

Origin- pubic bone and pubic symphysis
Insertion- xiphoid process; costal cartilage of ribs 5-7
Action- Flexes trunk; assists in forced expiration

Question 16

Internal Obliques

Answer 16

Origin- lumbar fascia, iliac crest, and inguinal ligament
Insertion- linea alba and ribs 9-12
Action- Laterally flexes trunk; rotates to the same side; assists in forced expiration

Question 17

External Obliques

Answer 17

Origin- Ribs 5-12
Insertion- linea alba
Action- Laterally flexes trunk; rotates to the opposite side; assists in forced expiration

Question 18

Transversus Abdominis

Answer 18

Origin- lumbar fascia
Insertion- Linea alba
Action- Assists in forced expiration