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NE1 > innervations > Flashcards

innervations Flashcards

1
Q

Platysma innervation and action

A

Innervation: Cervical branch of Facial N.
A: Draws corners of mouth inferiorly, draws skin of the neck superiorly

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2
Q

Sternocleidomastoid muscle innervation and action

A

Innervation: Spinal accessory nerve (CN XI, motor)
Action: Unilateral contraction = ipsilateral lateral flexion & contralateral rotation
Bilateral contraction = cervical flexion

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3
Q

Trapezius muscle innervation and action

A

Innervation: Spinal accessory nerve (CN XI; motor)
A: Elevates, retracts, and rotates scapulae superiorly
Descending (superior) fibers: elevate scapulae/shoulders; maintain level of shoulders against gravity or
resistance

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4
Q
  • Sternohyoid Muscle innervation and action
A

Innervated by Ansa Cervicalis (C1-C3)
Depresses hyoid after elevation during swallowing

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5
Q
  • Superior Belly of Omohyoid muscle innervation and action
A

Innervated by: Ansa Cervicalis (C1-C3)
Depresses, retracts, and steadies hyoid
Inferior belly attaches to scapula and is in the posterior triangle of neck

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6
Q

Sternothyroid muscle innervation and action

A

Innervation Ansa Cervicalis (C2-C3)
Depresses hyoid and larynx

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7
Q

Thyrohyoid muscle innervation and action

A

Innervated by nerve to thyrohyoid (C1)
Depresses hyoid and elevates larynx

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8
Q

Mylohyoid innervation and action

A

Innervation: Nerve to mylohyoid, a branch of inferior alveolar nerve (from mandibular nerve, CN V3)
A: Elevates hyoid, floor of mouth, and tongue during swallowing and speaking

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9
Q

Geniohyoid innervation and action

A

Innervation: nerve to geniohyoid (C1)
A: Pulls hyoid anterosuperiorly; shortens floor of mouth; widens pharynx

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10
Q

Stylohyoid innervation and action

A

Innervated by: Facial nerve (CN VII), Stylohyoid (preparotid) branch of Facial Nerve
A: Elevates and retracts hyoid, elongating floor of mouth

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11
Q

Digastric innervation and action

A

Anterior belly innervation: Nerve to mylohyoid, a branch of inferior alveolar nerve from mandibular
division of the Trigeminal nerve (CN V3)
Posterior belly innervation: Facial nerve (CN VII), Digastric (preparotid) branch of Facial Nerve
A: Working with infrahyoid muscles, depresses mandible against resistance; elevates and steadies hyoid
during swallowing and speaking

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12
Q

longus colli innervation and action

A

c2-6
neck flexion, rotate face away, laterally flex neck

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13
Q

longus capitis innervation and action

A

c1-c3
flex head

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14
Q

rectus capitis anterior innervation and action

A

c1-c2
flex head

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15
Q

rectus capitis lateralis innervation and action

A

c1-c2
laterally flex head

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16
Q

anterior scalene innervation and action

A

c4-c6
elevate 1st rib, laterally flex neck, flex neck, rotate face away

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17
Q

middel scalene innervation and action

A

c3-c8
elevate 1st rib, laterally flex neck

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18
Q

posterior scalene

A

c6-c8
elevate 2nd rib, laterally flex neck

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19
Q

What is the action and innervation of the Platysma?

A

Action: Depresses the mandible, tenses skin of the neck.
Innervation: Cervical branch of the facial nerve (CN VII).

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20
Q

What is the action and innervation of the Trapezius?

A

Action: Elevates, retracts, and rotates scapula; lower fibers depress scapula

Innervation: Accessory nerve (CN XI) and cervical spinal nerves C3 and C4

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21
Q

What is the action and innervation of the Sternocleidomastoid ?

A

Action: Flexes and laterally rotates head; aids in forced inspiration
Innervation: Accessory nerve (CN XI), cervical nerves C2 and C3

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22
Q

What is the action and innervation of the Sternohyoid?

A

Action: Depresses hyoid after swallowing
Innervation: Ansa cervicalis (C1-C3)

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23
Q

What is the action and innervation of the Sternothyroid?

A

Action: Depresses thyroid cartilage
Innervation: Ansa cervicalis (C1-C3)

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24
Q

What is the action and innervation of the Thyrohyoid?

A

Action: Depresses hyoid and elevates larynx
Innervation: C1 via hypoglossal nerve (CN XII)

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25
Q

What is the action and innervation of the Cricothyroid?

A

Action: Tenses and elongates vocal cords
Innervation: External branch of the superior laryngeal nerve (CN X)

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26
Q

What is the action and innervation of the Superior belly of Omohyoid?

A

Action: Depresses hyoid bone
Innervation: Ansa cervicalis (C1-C3)

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27
Q

What is the action and innervation of the Inferior belly of Omohyoid?

A

Action: Depresses hyoid bone
Innervation: Ansa cervicalis (C1-C3)

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28
Q

What is the action and innervation of the Anterior belly of Digastric?

A

Action: Elevates hyoid and assists in opening mandible
Innervation: Mylohyoid nerve (branch of CN V3)

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29
Q

What is the action and innervation of the Posterior belly of Digastric?

A

Action: Elevates hyoid and assists in opening mandible
Innervation: Facial nerve (CN VII)

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30
Q

What is the action and innervation of the Stylohyoid?

A

Action: Elevates and retracts hyoid
Innervation: Facial nerve (CN VII)

31
Q

What is the action and innervation of the Mylohyoid?

A

Action: Elevates hyoid and floor of mouth
Innervation: Mylohyoid nerve (branch of CN V3)

32
Q

What is the action and innervation of the Geniohyoid?

A

Action: Pulls hyoid bone anterosuperiorly
Innervation: C1 via hypoglossal nerve (CN XII)

33
Q

What is the action and innervation of the Anterior Scalene?

A

Action: Elevates the first rib; laterally flexes and rotates neck
Innervation: Cervical spinal nerves C4-C6

34
Q

What is the action and innervation of the Middle Scalene?

A

Action: Elevates the first rib; laterally flexes neck
Innervation: Cervical spinal nerves C3-C8

35
Q

What is the action and innervation of the Posterior Scalene?

A

Action: Elevates the second rib; laterally flexes neck
Innervation: Cervical spinal nerves C6-C8

36
Q

What is the action and innervation of the Longus Capitis?

A

Action: Flexes head and neck
Innervation: Cervical spinal nerves C1-C3

37
Q

What is the action and innervation of the Longus Colli?

A

Action: Flexes neck; assists in lateral flexion and rotation
Innervation: Cervical spinal nerves C2-C6

38
Q

What is the action and innervation of the Superior Pharyngeal Constrictor?

A

Action: Constricts pharyngeal walls during swallowing
Innervation: Pharyngeal branch of vagus nerve (CN X)

39
Q

What is the action and innervation of the Middle Pharyngeal Constrictor?

A

Action: Constricts pharyngeal walls during swallowing
Innervation: Pharyngeal branch of vagus nerve (CN X)

40
Q

What is the action and innervation of the Inferior Pharyngeal Constrictor?

A

Action: Constricts pharyngeal walls during swallowing
Innervation: Pharyngeal branch of vagus nerve (CN X)

41
Q

What is the action and innervation of the Occipitofrontalis?

A

Action: Raises eyebrows and wrinkles forehead
Innervation: Facial nerve (CN VII)

42
Q

What is the action and innervation of the Orbicularis Oculi?

A

Action: Closes eyelids
Innervation: Facial nerve (CN VII)

43
Q

What is the action and innervation of the Orbicularis Oris?

A

Action: Compresses and protrudes lips
Innervation: Facial nerve (CN VII)

44
Q

What is the action and innervation of the Zygomaticus Major?

A

Action: Elevates corner of mouth (smiling)
Innervation: Facial nerve (CN VII)

45
Q

What is the action and innervation of the Zygomaticus Minor?

A

Action: Elevates upper lip
Innervation: Facial nerve (CN VII)

46
Q

What is the action and innervation of the Depressor Labii Inferioris?

A

Action: Depresses lower lip
Innervation: Facial nerve (CN VII)

47
Q

What is the action and innervation of the Depressor Anguli Oris?

A

Action: Depresses corner of mouth (frowning)
Innervation: Facial nerve (CN VII)

48
Q

What is the action and innervation of the Mentalis?

A

Action: Elevates and protrudes lower lip
Innervation: Facial nerve (CN VII)

49
Q

What is the action and innervation of the Levator Labii Superioris?

A

Action: Elevates upper lip
Innervation: Facial nerve (CN VII)

50
Q

What is the action and innervation of the Levator Anguli Oris?

A

Action: Elevates corner of mouth
Innervation: Facial nerve (CN VII)

51
Q

What is the action and innervation of the Buccinator?

A

Action: Compresses cheek, holds food between teeth
Innervation: Facial nerve (CN VII)

52
Q

What is the action and innervation of the Masseter?

A

Action: Elevates and protrudes mandible
Innervation: Mandibular nerve (CN V3)

53
Q

What is the action and innervation of the Temporalis?

A

Action: Elevates and retracts mandible
Innervation: Mandibular nerve (CN V3)

54
Q

What is the action and innervation of the Lateral Pterygoid?

A

Action: Protracts mandible, aids in lateral movements
Innervation: Mandibular nerve (CN V3)

55
Q

What is the action and innervation of the Medial Pterygoid?

A

Action: Elevates mandible, aids in lateral movements
Innervation: Mandibular nerve (CN V3)

56
Q

What is the action and innervation of the Levator Palpebrae Superioris?

A

Action: Elevates upper eyelid
Innervation: Oculomotor nerve (CN III)

57
Q

What is the action and innervation of the Superior Oblique?

A

Action: Depresses, abducts, and internally rotates eyeball
Innervation: Trochlear nerve (CN IV)

58
Q

What is the action and innervation of the Superior Rectus?

A

Action: Elevates, adducts, and internally rotates eyeball
Innervation: Oculomotor nerve (CN III)

59
Q

What is the action and innervation of the Lateral Rectus?

A

Action: Abducts eyeball
Innervation: Abducens nerve (CN VI)

60
Q

What is the action and innervation of the Medial Rectus?

A

Action: Adducts eyeball
Innervation: Oculomotor nerve (CN III)

61
Q

What is the action and innervation of the Inferior Rectus?

A

Action: Depresses, adducts, and externally rotates eyeball
Innervation: Oculomotor nerve (CN III)

62
Q

What is the action and innervation of the Inferior Oblique?

A

Action: Elevates, abducts, and externally rotates eyeball
Innervation: Oculomotor nerve (CN III)

63
Q

What is the action and innervation of the Levator Veli Palatini?

A

Action: Elevates soft palate during swallowing
Innervation: Pharyngeal plexus of vagus nerve (CN X)

64
Q

What is the action and innervation of the Tensor Veli Palatini?

A

Action: Tenses soft palate, opens auditory tube
Innervation: Mandibular nerve (CN V3)

65
Q

What is the action and innervation of the Salpingopharyngeus?

A

Action: Elevates pharynx and larynx during swallowing
Innervation: Pharyngeal plexus of vagus nerve (CN X)

66
Q

What is the significance of the Salpingopharyngeal Fold?

A

mucosal fold covering the Salpingopharyngeus muscle; assists in equalizing pressure in the middle ear

67
Q

What is the action and innervation of the Stylopharyngeus?

A

Action: Elevates pharynx and larynx during swallowing
Innervation: Glossopharyngeal nerve (CN IX)

68
Q

What is the action and innervation of the Palatoglossus?

A

Action: Elevates posterior tongue, brings soft palate towards tongue
Innervation: Pharyngeal plexus of vagus nerve (CN X)

69
Q

What is the significance of the Palatoglossal Fold?

A

Mucosal fold containing the Palatoglossus muscle, forms the boundary of the oral cavity and oropharynx

70
Q

What is the action and innervation of the Palatopharyngeus?

A

Action: Elevates pharynx and narrows oropharyngeal isthmus
Innervation: Pharyngeal plexus of vagus nerve (CN X)

71
Q

What is the significance of the Palatopharyngeal Fold?

A

Significance: Mucosal fold covering the Palatopharyngeus muscle; plays a role in pharyngeal closure during swallowing

72
Q

What is the action and innervation of the Genioglossus?

A

Action: Protrudes and depresses tongue
Innervation: Hypoglossal nerve (CN XII)

73
Q

What is the action and innervation of the Styloglossus?

A

Action: Retracts and elevates tongue
Innervation: Hypoglossal nerve (CN XII)

74
Q

What is the action and innervation of the Hyoglossus?

A

Action: Depresses and retracts tongue
Innervation: Hypoglossal nerve (CN XII)

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