Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Anatomy > CN IX, X, XI, XII > Flashcards

CN IX, X, XI, XII Flashcards

1
Q

at what level of the brainstem would you find the hypoglossal nucleus

A

rosrtal medulla

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what is the function of CN XII

A

tongue protrusion of the genioglossus (tongue) muscle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what would happen if there was a lesion in the hypoglossal (lower motor neuron) nerve

A
  • tongue deviates ipsilaterally to lesion
  • fasiculations
  • atrophy
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what is the upper motor neuron sending signals to the hypoglossal nucleus

A

corticobulbar fibers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what would happen if there was a lesion in the corticobulbar pathway (upper motor neuron) with regards to CN XII

A
  • tongue would deviate contralaterally (cuz decussates adjacent to hypoglossal nucleus)
  • no fasiculations
  • no atrophy
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

CN XII is what type of nerve ?

A

somatic efferent (motor)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

CN XI is what type of nerve ?

A

brachial motor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what muscles does CN XI innervate

A

SCM, trapezius

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what would the effect be on the trapezius m. if there was an injury to CN XI

A

paralyzed trapezius causing

  • scap and clavicle hang
  • weak shoulder shrug
  • atrophy leading to scalloped neck
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

the somatic sensory portion of CN IX recieves impulses from where ? and then synapses where ?

A

skin of outer ear to

  • spinal trigeminal nucleus
  • superior ganglion of IX
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

the visceral sensory portion of CN IX recieves impulses from where ? and then synapses where ?

A

post. 1/3 taste buds and mucosa, carotid body and sinus, pharynx/oropharynx and middle ear to
- nucleus of solitory tract
- inferior ganglion of IX

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

the visceral motor of CN IX has origins where, and sends efferent to ?

A

inferior salivatory nucleus to otic ganglion to parotid gland

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

the brachial motor of CN IX has origins where and sends efferents to ?

A

nucleus ambiguus to stylopharyngeus (muscle of pharynx)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

the nucleus ambiguus deals with motor or sensory input, specifically what muscle ?

A

motor to stylopharyngeus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

what CN all have sensory input on the outer ear ?

A

CN VII, IX, X

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

changes in blood pressure would be sensed where ?

A

carotid sinus

17
Q

changes in blood O2, CO2, or pH levels would be sensed where ?

A

carotid body

18
Q

what ganglia/nuclei are involved with the carotid body and carotid sinus

A

inferior ganglion of IX and solitary nucleus

19
Q

what is glossopharyngeal neuralgia

A

sudden burst of pain starting in post. 1/3 of tongue or pharynx then spreading to ear

20
Q

where is the trigger zone for glossopharyngeal neuralgia

A

tongue/pharynx

21
Q

attacks of glossopharyngeal neuralgia are precipitated by ?

A

swallowing or coughing

22
Q

somatic sensory for CN X has inputs from where, and then synapses where ?

A

skin of outer ear to

  • spinal trigeminal nucleus
  • superior ganglion of X
23
Q

visceral sensory for CN X has inputs from where, and then synapses where ?

A

taste buds of epiglottis and esophagus, also pain and temp from thorax, abdominals, mucosa of larynx/pharynx

  • solitary nucleus
  • spinal trigeminal nucleus
  • inferior ganglion of X
24
Q

nucleus ambigus has cell bodies for what CN ?

A

IX, and X

25
Q

what CN exit the skull at the jugular foramen

A

IX, X, and XI

26
Q

visceral motor for CN X originates where and sends efferents where ?

A

dorsal motor nucleus and nucleus ambigus to

-thoracic and abdominal viscera

27
Q

brachial motor of CN originates where and sends efferents to where ?

A

nucleus ambigus to

  • larynx pharynx laterally
  • heart and lungs medially
28
Q

what CN are involved with the spinal trigeminal nucleus

A

V, IX, X

29
Q

what CN are involved with the nucleus of the solitary tract

A

VII, IX, X

30
Q

what is the afferent and efferent limb of the gag reflex

A

afferent - CN IX

efferent - X

31
Q

what is the afferent and efferent limb of the tongue thrust reflex

A

afferent - CN V or IX

efferent - CN XII

32
Q

what is a vasovagal syncope

A

loss of consciousness due to vagus triggering decrease in heart rate, blood pressure, and cererebral flow

33
Q

what nerves are at risk of entrapment by a skull base tumor in jugular foramen syndrome

A

IX, X, XI, XII

34
Q

what are some of the major symptoms of jugular foramen syndrome

A
  • palate droops
  • wasting of tongue
  • oropharyngeal sensory loss,
  • uvula deflects contralateral to lesion
  • atrophy of SCM and trapezius

Anatomy (35 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions