Muscles

Question 1

Orbicularis oculi

Answer 1

Orbital part (surrounds eyelids) - buries eyelids
Palpebral part (within eyelids) - closes eyelids

Question 2

Compressor naris

Answer 2

Compress nasal cartilages

Question 3

Dilator naris

Answer 3

Dilates nostrils

Question 4

Procerus

Answer 4

Wrinkles skin of nose

Question 5

Orbicularis oris

Answer 5

Closes mouth (surrounds lips)

Question 6

Levator labii superioris

Answer 6

Lifts upper lip

Question 7

Zygomaticus major and minor

Answer 7

Raise and pull upper lip laterally

Question 8

Levator anguli oris

Answer 8

Raises corner of mouth

Question 9

Risorius

Answer 9

Smiling muscle

Question 10

Depressor anguli oris

Answer 10

Tragedy muscle

Question 11

Depressor labii inferioris

Answer 11

Depress lower lip

Question 12

Mentalis

Answer 12

Wrinkles skin of chin

Question 13

Buccinator

Answer 13

Compresses mouth and keeps food between teeth when chewing

Question 14

Frontalis

Answer 14

Move scalp, raise eyebrows

Question 15

Occipitalis

Answer 15

Move scalp

Question 16

Platysma

Answer 16

Stretches skin of neck

Question 17

Medial rectus

Answer 17

Adduct eye

CN III

Question 18

Lateral rectus

Answer 18

Abduct eye

CN VI

Question 19

Inferior rectus

Answer 19

Adduct eye
Lower eye
Laterally rotate eye
CN III

Question 20

Superior rectus

Answer 20

Adduct eye
Raise eye
Medically rotate eye
CN III

Question 21

Superior oblique

Answer 21

Abduct eye
Lower eye
Medically rotate eye
CN IV

Question 22

Inferior oblique

Answer 22

Abduct eye
Raise eye
Laterally rotate eye
CN III

Question 23

Sternohyoid

Answer 23

Infrahyoid muscle

Action: Depresses hyoid bone
Action Ansa Cervicallis

Question 24

Omohyoid

Answer 24

Infrahyoid muscle

Action: depresses hyoid bone
Nerve: ansa cervicallis

Question 25

Thyrohyoid

Answer 25

Infrahyoid muscle Action: Depresses hyoid bone, elevates larynx Nerve: C1 via branch hitch-hiking with CN XII

Question 26

Sternothyroid

Answer 26

Infrahyoid muscle Action: Depresses thyroid cartilage, indirectly depresses hyoid bone and larynx Nerve: Ansa Cervicallis

Question 27

Sternocleidomastoid

Answer 27

Origin: Two heads - sternum (manubrium) and clavicle (medial 1/3) Insertion: both heads to temporal bone (mastoid process) Action: Acting on both sides - flex neck, acting on one side - rotate head so face is directed to opposite side Nerve: CN XI

Question 28

Scalenus anterior and mediums

Answer 28

Origin: Vertebra (transverse processes of upper cervical) Insertion: Rib 1 Action: flex neck and elevate rib 1 Nerve: Branches of ventral rami of cervical spinal nerves

Question 29

Digastric

Answer 29

Surpahyoid muscle Action: elevated hyoid bone, depresses mandible Nerve: Posterior belly - CN VII Anterior belly - CN V - V3

Question 30

Stylohyoid

Answer 30

Suprahyoid muscle Action: elevates hyoid Nerve: CN VII

Question 31

Mylohyoid

Answer 31

Suprahyoid muscle Action: elevates hyoid bone, raises floor of mouth during swallowing Nerve: CN V - V3

Question 32

Geniohyoid

Answer 32

Suprahyoid muscle Action: Elevates hyoid bone, draws hyoid forward Nerve: C1 via branch hitch-hiking with CN XII

Question 33

Cricothyroid

Answer 33

Action - tenses vocal fold, raises pitch of sound Nerve - external laryngeal n. (X)

Question 34

Thyroarytenoid

Answer 34

Relaxes vocal fold, decreases pitch of sound Recurrent Laryngeal n. (X)

Question 35

Posterior cricoarytenoid

Answer 35

ABducts vocal folds, opens Roma glottidis Recurrent Laryngeal n. (X)

Question 36

Lateral cricoarytenoid

Answer 36

ADducts vocal folds, closes Roma glottidis Recurrent Laryngeal n. (X)

Question 37

Arytenoid (transverse arytenoid)

Answer 37

ADducts vocal folds, closes Roma glottidis Recurrent Laryngeal n. (X)

Question 38

Aryepiglottic m.

Answer 38

Pulls down epiglottis during swallowing Recurrent Laryngeal n. (X)

Question 39

Masseter

Answer 39

Muscle of mastication Trigeminal nerve (CN V)

Question 40

Temporalis

Answer 40

Muscle of Mastication Trigeminal Nerve

Question 41

Lateral Pterygoid

Answer 41

Muscle of mastication - opens mouth Trigeminal nerve

Question 42

Medial Pterygoid

Answer 42

Muscle of Mastication - closes mouth Trigeminal nerve