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Cranial Nerves > Motor > Flashcards

Motor Flashcards

1
Q

Trigeminal V1- Mandibular

A
  • mandibular br
  • masseter
  • tensor veli palatini
  • anterior belly of the digastric
  • mylohyoid
  • temporalis
  • lateral pterygoid
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2
Q

What CN innervates the closing of the nasopharynx and oropharynx to stop nasal regurgitation

A

CN V1 (Mandibular)

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3
Q

Facial VII

A
  • buccinator
  • orbicularis oris
  • levator labii superioris
  • zygomatic major
  • depressor labii
  • stylohyoid
  • *oral prep and transport
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4
Q

Muscle responsible for smiling

A

zygomatic major

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5
Q

muscle that depresses lower lip into a frown

A

depressor labii

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6
Q

Glossopharyngeal IX

A
  • stylopharyngeus

- connects styloid process of temporal bone and hyoid

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7
Q

Special information about CN IX motor function

A

aids in dilation of the pharynx to vomit/expel materials; during swallow: aids in shortening of the pharynx

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8
Q

CN IX swallowing stage

A

oral transport and beginning of the pharyngeal stage (pharyngeal trigger)

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9
Q

Vagus X; Pharyngeal br.

A

Innervates:

  • anterior/posterior faucial pillars
  • salpilngopharyngeus
  • levator veli palatini
  • superior, medial, inferior pharyngeal constrictor
  • cricopharyngeal m.
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10
Q

salpilngopharyngeus

A

elevates the upper lateral pharyngeal walls, nasopharynx

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11
Q

levator veli palatini

A

elevates soft palate; seals the nasopharynx from the oropharynx

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12
Q

What CNs is the cricopharyngeal muscle controlled by?

A

Vagus: Pharyngeal br

RLN, and external br. of SLN

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13
Q

Plexus

A

CN IX and X

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14
Q

Vagus; external br of SLN

A
  • cricothyroid and UES
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15
Q

Cricothyroid and UES function in swallowing

A

plays no role in deglutition but gives us an idea about sensory integrity of the larynx

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16
Q

Vagus X; RLN

A
  • Thyroarytenoid (TA)
  • oblique
  • transverse aryetnoid
  • lateral cricoarytenoid
  • posterior cricoarytenoid
  • posterior cricoarytenoid
  • *Closes off the airway at the level of the VF for the swallow
  • *Helps in producing effective coughing
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17
Q

only laryngeal muscle that opens the glottis

A

posterior cricoarytenoid

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18
Q

muscle that adducts the arytenoids

A

lateral cricoarytenoid

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19
Q

Hypoglossal XII

A
  • intrinsic muscles
  • extrinsic muscles
  • hypoglossus
  • genioglossus
  • styloglossus
  • *oral/lingual manipulation
20
Q

depresses/retracts the tongue

A

hyoglossus

21
Q

protrudes apex of the tongue; depresses the medial portion of the tongue by making it concave from side to side

A

genioglossus

22
Q

draws tongue up (elevates) and back

A

styloglossus

23
Q

T/F The genioglossus is a small muscle

A

FALSE…Its big!!

24
Q

Cervical plexus nerves

A

IX; X

25
Q

Cervical plexus muscles

A
  • geniohyoid
  • thyrohyoid
  • sternohyoid
  • omohyoid
26
Q

Muscles that elevate the hyoid

A
  • Geniohyoid
  • Thyrohyoid
  • Mylohyoid
  • stylohyoid
  • anterior belly of the digastric
27
Q

Geniohyoid function

A

elevation and anterior movement of the hyoid

28
Q

thyrohyoid function

A
  • approximates thyrohyoid and hyoid
  • with hyoid fixed; it raises the thyroid during the swallow
  • with larynx fixed; it lowers the hyoid
29
Q

mylohyoid function

A
  • elevates the hyoid bone during the swallow

- helps depressing in the jaw

30
Q

CN that innervates the mylohyoid

A

CN V

31
Q

stylohyoid function

A
  • suprahyoid muscle that elevates the hyoid
  • helps to retract the tongue
  • bridges styloprocess on temporal bone to hyoid bone
32
Q

CN that innervates the stylohyoid

A

VII

33
Q

Anterior belly of the digastric

A
  • elevates hyoid if jaw fixes during the swallow

- helps in depressing the jaw

34
Q

CN that innervates the anterior belly of the digastric

A

CN V

35
Q

What happens when cricothyroid and UES are contracted

A

They elevate pitch by lengthening VF so they vibrate faster

36
Q

T/F Crycothyroid and UES play a role in deglutition

A

FALSE but it gives us an idea about sensory integrity in the larynx

37
Q

Vagus X; Recurrent laryngeal nerve (RLN)

A
  • thyroarytenoids
  • oblique
  • transverse arytenoids
  • posterior cricoarytenoid
38
Q

RLN function

A

Close off airway at the level of the VF; helps in producing an effective cough

39
Q

Extrinsic muscles of the tongue

A
  • genioglossus
  • hyloglossus
  • styloglossus
  • palatoglossus
40
Q

genio-

A

chin

41
Q

omo-

A

shoulder

42
Q

genioglossus

A
  • depresses center of the tongue

- protrudes the tongue

43
Q

palatoglossus

A

depress the palate

elevate the tongue

44
Q

-glossus

A

tongue

45
Q

what CN is the cricothyroid innervated by?

A

External branch of the SLN

46
Q

all muscles of the larynx (except one) are innervated by which CN?

A

Motor RLN

Cranial Nerves (2 decks)

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