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Head and neck > XII Hypoglossal > Flashcards

XII Hypoglossal Flashcards

1
Q

Neurons of hypoglossal nerve XII

A

Somatic efferent

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2
Q

Terminal sulcus

A

Point that separates the anterior 2/3 from posterior 1/3 of tongue

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3
Q

Foramen caecum

A

Point in tongue where the thyroid gland originates and invaginates

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4
Q

Lingual septum

A

Middle of tongue where the two bilateral origins of the tongue fuse together

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5
Q

Muscles that join at the lingual septum

A

Genioglossus muscle

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6
Q

Extrinsic muscles involved in degluition

A

Genioglossus
Palatoglossus
Styloglossus
Hyoglossus

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7
Q

Palatoglossus function

A

Close oropharynx space when it contracts

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8
Q

Hyoglossus function

A

Depress the tongue when it contracts

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9
Q

Palatoglossal arch function

A

Elevate tongue when it contracts

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10
Q

Intrinsic muscles of the tongue

A

Superior longitudinal
Vertical
Transverse
Inferior longitudinal

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11
Q

Function of intrinsic muscles of the tongue

A

Important for speech

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12
Q

Geniohyoid muscle origin and function

A

Not part of the tongue
It is below the intrinsic muscles of the tongue
Function - elevate the hyoid bone

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13
Q

Relationship of hypoglossal XII nerve with both internal and external carotid arteries, stylohyoid muscle and hyoglossus muscle

A

Superficial to both carotid arteries
Deep to stylohyoid muscle
Superficial to hyoglossus muscle

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14
Q

Hypoglossal nerve XII innervated what intrinsic muscles of the tongue

A

Hyoglossus
Styloglossus
Genioglossus
Intrinsic muscles

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15
Q

Which nerve is not innervated by hypoglossal nerve XII

A

Palatoglossus muscle

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16
Q

Innervation of palatoglossus nerve

A

Pharyngeal branch of vagus nerve X

17
Q

C1 path

A

Travels with glossopharyngeal XII fibers

18
Q

C1 innervates….

A

Geniohyoid

Thyrohyoid

19
Q

Internal carotid artery branches

A

None in the neck

20
Q

External carotid artery branches in neck

A

Superior thyroid artery

Lingual artery

21
Q

Relationship between lingual artery with hypoglossal nerve XII and hyoglossus muscles

A

Deep to hypoglossal nerve XII
Deep to hyoglossus muscle

XII hypoglossal nerve is superficial to both carotid arteries and to hyoglossus muscle

22
Q

Somatic afferent definition

A

Sensing of touch, temperature, pain

23
Q

Visceral afferent definition

A

Activate smooth muscle in viscera

24
Q

SOMATIC AFFERENT innervation of tongue

A

Anterior 2/3 through lingual nerve (V, trigeminal nerve termination)
Posterior 1/3 through glossopharyngeal nerve (IX)

25
Q

VISCERAL AFFERENT innervation of tongue

A

Anterior 2/3 through chorda tympani (VII)

Posterior 1/3 through glossopharyngeal nerve (IX)

26
Q

Taste of tongue

A

Anterior 2/3 through chorda tympani VII

Posterior 1/3 through IX glossopharyngeal and X vagus nerve

Head and neck (7 decks)

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