Anterior Neck, Arm, and Chest

Question 1

Mylohyoid action

Answer 1

Elevates hyoid, floor of mouth, and tongue during swallowing and speaking

Question 2

Geniohyoid action

Answer 2

Pulls hyoid anterosuperiorly; shortens floor of mouth; widens pharynx

Question 3

Stylohyoid action

Answer 3

Elevates and retracts hyoid, thus elongating floor of mouth

Question 4

Digastric action

Answer 4

Working with infrahyoid muscles, depresses mandible against resistance; elevates and steadies hyoid during swallowing and speaking

Question 5

Sternohyoid action

Answer 5

depresses hyoid after elevation during swallowing

Question 6

Omohyoid action

Answer 6

Depresses, retracts, and steadies hyoid

Question 7

Sternothyroid action

Answer 7

depresses hyoid and larynx

Question 8

Thyrohyoid action

Answer 8

Depresses hyoid and elevates larynx

Question 9

pectoralis major origin

Answer 9

sternal half of clavicle, sternum to 7th rib, cartilages of true ribs, aponeurosis of external abdominal oblique muscle

Question 10

pectoralis major insertion

Answer 10

lateral lip of intertubercular sulcus of humerus

Question 11

pectoralis major innervation

Answer 11

medial and lateral pectoral nerves; the brachial plexus (C5, T1)

Question 12

pectoralis major action

Answer 12

flexes, abducts, and medially rotates arm

Question 13

pectoralis minor action

Answer 13

lowers lateral angle of scapula and protracts scapula

Question 14

pectoralis minor origin

Answer 14

outer surface of upper margin of ribs 3-5

Question 15

pectoralis minor insertion

Answer 15

coracoid process of scapula

Question 16

pectoralis minor innervation

Answer 16

medial pectoral nerve

Question 17

biceps origin

Answer 17

Long head: supraglenoid tubercle of scapula
Short head: coracoid process of scapula

Question 18

biceps insertion

Answer 18

radial tuberosity, fascia of forearm via bicipital aponeurosis

Question 19

biceps innervation

Answer 19

Musculocutaneous nerve (C5, C6)

Question 20

biceps action

Answer 20

flexes and supinates forearm at elbow

Question 21

brachialis origin

Answer 21

distal half of anterior surface of humerus

Question 22

brachialis insertion

Answer 22

coronoid process and tuberosity of ulna

Question 23

brachialis innervation

Answer 23

musculotaneous nerve (C5, C6) and radial nerve

Question 24

brachialis action

Answer 24

flexes forearm at elbow

Question 25

coracobrachialis origin

Answer 25

coracoid process of scapula

Question 26

coracobrachialis insertion

Answer 26

middle third of medial surface of humerus

Question 27

coracobrachialis innervation

Answer 27

musclocutaneous nerve (C6, C7)

Question 28

coracobrachialis action

Answer 28

flexes and adducts arm at shoulder