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Gross Anatomy > Neck Muscles > Flashcards

Neck Muscles Flashcards

1
Q

what muscles elevate the hyoid bone?

A

mylohyoid, geniohyoid, stylohyoid, diagastric

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2
Q

what innervates the mylohyoid?

A

nerve to mylohyoid (V3)

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3
Q

what innervates the geniohyoid?

A

C1 fibers (runs with CN XII)

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4
Q

what innervates the stylohyoid?

A

cervical branch of facial (CN VII)

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5
Q

what innervates the digastric?

A

“DI”-gastric… two bellies

anterior belly: nerve to mylohyoid (V3)
posterior belly: facial (VII)

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6
Q

what muscles depress the hyoid bone?

A

sternohyoid, sternothyroid, omohyoid, thyrohyoid

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7
Q

what innervates the sternohyoid?

A

C1, C2, C3 (ana cervicalis)

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8
Q

what innervates the sternothryoid?

A

C1, C2, C3 (ana cervicalis)

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9
Q

what innervates the omohyoid?

A

C1, C2, C3 (ana cervicalis)

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10
Q

what innervates the thyrohyoid?

A

C1 fibers (run with CN XII)

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11
Q

what are the longitudinal muscles of the pharynx?

A

stylopharyngeus, salpingopharyngeus, palatopharyngeus

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12
Q

what are the actions of the longitudinal muscles of the pharynx?

A

elevates the pharynx and the larynx

except the salpingopharyngeus, which only elevates the pharynx

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13
Q

what innervates the stylopharyngeus?

A

glossopharyngeal nerve

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14
Q

what innervates the salpingopharyngeus?

A

vagus nerve (pharyngeal plexus)

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15
Q

what innervates the palaopharyngeus?

A

vagus nerve (pharyngeal plexus)

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16
Q

what are the circular muscles of the pharynx?

A

superior constrictor, middle constrictor, inferior constrictor

17
Q

what is the action of the circular muscles of the pharynx?

A

constricts the pharynx

18
Q

what innervates the circular muscles of the pharynx?

A

vagus nerve (pharyngeal plexus)

except the inferior constrictor is also innervated by the external branch of the superior laryngeal nerve of X and the recurrent laryngeal nerve

19
Q

what is the action of the lateral cricoarytenoid?

A

adducts the vocal ligament and assists in closing the glottis

20
Q

what is the action of the posterior cricoartenoid?

A

abducts the vocal ligament and opens the glottis

21
Q

what is the action of the thyroarytenoid?

A

relaxes the vocal ligament

22
Q

what is the action of the vocalis?

A

regulates tension of segments of vocal ligament

23
Q

what is the action of the cricothyroid?

A

tenses vocal cords

24
Q

what is the action of the transverse arythenoid?

A

closes glottis by adducting arytenoid cartilage

25
Q

what is the action of the aryepiglotticus?

A

narrows inlet of larynx

26
Q

what innervates the muscles that act on the larynx?

A

recurrent laryngeal nerve of X

EXCEPT the cricothyroid is innervated by the external branch of superior laryngeal nerve of X

Gross Anatomy (20 decks)

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