Muscles

Question 1

Geniohyoid origin and insertion

Answer 1

O: mental spines of the mandible
I: Body of hyoid

Question 2

Geniohyoid action

Answer 2

Depress the mandible
Elevate the hyoid bone

Question 3

Geniohyoid innervation and artery

Answer 3

N: C1 carried by hypoglossal n
A: Sublingual a

Question 4

Mylohyoid origin and insertion

Answer 4

O: mylohyoid line of the mandible

I: midline raphe
body of the hyoid

Question 5

Mylohyoid action

Answer 5

Depress mandible
Elevate tongue and hyoid bone

Question 6

Mylohyoid innervation and artery

Answer 6

N: n to the mylohyoid
(from alveolar n from CNV(3))

A: Submental a
Sublingual a

Question 7

Digastric origin and insertion

Answer 7

O: anterior belly - digastric fossa of mandible; posterior belly - mastoid notch of temporal bone

I: Body of hyoid via fibrous loop over intermediate tendon

Question 8

Digastric action

Answer 8

Elevates hyoid bone
Depresses the Mandible

Question 9

Digastric innervation and artery

Answer 9

N: Anterior belly - mylohyoid n from CNV(3); Posterior belly - Fascial n (CNVII)

A: Anterior belly - submental a. ; posterior belly - occipital a.

Question 10

Omohyoid origin and insertion

Answer 10

O: Inferior belly - upper border of scapula medial to scapular notch; superior belly - intermediate tendon

I: Inferior belly - intermediate tendon; superior belly - lower border of the hyoid lateral to sternohyoid insertion

Question 11

Omohyoid action

Answer 11

Depress/stabilize hyoid bone

Question 12

Omohyoid innervation and artery

Answer 12

N: Ansa Cervicalis C1-3

A: Lingual a., Superior thyroid a.

Question 13

Stylohyoid origin and insertion

Answer 13

O: posterior side of styloid process
I: Splits around digastric intermediate tendon to insert on body of hyoid

Question 14

Stylohyoid action

Answer 14

elevates and retracts hyoid bone

Question 15

Stylohyoid innervation and artery

Answer 15

N: Styloid branch of fascial n CNVII
A: branches from fascial and occipital arteries

Question 16

Sternohyoid origin and insertion

Answer 16

O: Posterior surfaces of manubrium and sternal end of clavicle
I: Lower border of hyoid bone, medial to omohyoid i.

Question 17

Sternohyoid action

Answer 17

Depresses/stabilizes hyoid bone

Question 18

Sternohyoid innervation and artery

Answer 18

N: Ansa cervicalis C1-3
A: Superior thyroid a, lingual a.

Question 19

Sternothyroid origin and insertion

Answer 19

O: Posterior surface of manubrium, below sternohyoid o.
I: Oblique line of thyroid cartilage

Question 20

Sternothyroid action

Answer 20

Depress/stabilize the hyoid bone
Depress larynx

Question 21

Sternothyroid innervation and artery

Answer 21

N: Ansa cervicalis C1-3
A: Superior thyroid a.

Question 22

Thyrohyoid origin and insertion

Answer 22

O: Oblique line of thyroid cartilage
I: Lower border of hyoid bone

Question 23

Thyrohyoid action

Answer 23

Elevate larynx
Depress/stabilize hyoid bone

Question 24

Thyrohyoid innervation and artery

Answer 24

N: Ansa cervicalis C1 via hypoglossal n
A: Superior thyroid a.

Question 25

Stapedius origin and insertion

Answer 25

O: walls of pyramidal eminence I: Neck of stapes

Question 26

Stapedius action

Answer 26

Dampen vibrations of stapes

Question 27

Stapedius innervation and artery

Answer 27

N: Facial n CNVII A: Anterior tympanic a

Question 28

Tensor Tympani origin and insertion

Answer 28

O: Cartilaginous auditory tube, greater wing of sphenoid bone I: Manubrium of malleus

Question 29

Tensor Tympani action

Answer 29

Dampen vibrations of tympanic membrane

Question 30

Tensor Tympani innervation and artery

Answer 30

N: Medial pterygoid branch of CNV A: Superior tympanic branch of middle meningeal a.

Question 31

What are the actions of the pharyngeal constrictors?

Answer 31

Constrict walls of pharynx during swallowing

Question 32

What muscles perform the following action: elevate (shorten and widen) pharynx and larynx, during swallowing and speaking

Answer 32

Stylopharyngeus, Salpingopharynges, Palatopharyngeus

Question 33

All of the pharynx muscles are innervated by [ ], except for [ ] which is innervated by [ ]

Answer 33

CN X - Pharyngeal branch of Vagus + pharyngeal plexus Stylopharyngeus CNIX - glossopharyngeal

Question 34

All of the pharynx muscles recieve blood supply from the Ascending Pharyngeal a, except [ ] which recieves from [ ]

Answer 34

Palatopharyngeus Ascending palatine artery branch of facial artery Descending palantine artery branch of maxillary artery

Question 35

What hyoid muscles are innervated by C1 fibers via the hypoglossal n

Answer 35

Geniohyoid and Thyrohyoid

Question 36

What hyoid muscles are innervated by n to mylohyoid?

Answer 36

Mylohyoid Anterior belly of digastric

Question 37

All of the arytenoid muscles are supplied by [a] artery except for [b] which is supplied by [c]

Answer 37

a. Inferior laryngeal a b. cricothyroid c. cricothyroid a

Question 38

All of the arytenoid muscles are innervated by [a] except for [b] which is supplied by [c]

Answer 38

a. inferior laryngeal n b. cricothyroid c. external laryngeal n

Question 39

The transverse and oblique arytenoid muscles perform what action

Answer 39

adduct the arytenoid cartilage

Question 40

Which muscles abduct and adduct the vocal folds?

Answer 40

Abduct: posterior cricoarytenoid Adduct: Lateral cricoarytenoid

Question 41

Which muscles stretch/tense and relax the vocal ligament?

Answer 41

Stretch/tense - cricothyroid Relax - thyroarytenoid