Brainscape's Knowledge GenomeTM

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


See full index

MBCHB3: Nervous system module. > Lecture 10: Cranial Nerves > Flashcards

Lecture 10: Cranial Nerves Flashcards

1
Q

What are the 12 cranial nerves?

A

on on on they travelled and found voldemort guarding very ancient horcruxes

  1. Olfactory
  2. Optic
  3. Occulomotor
  4. Trochlear
  5. Trigeminal
  6. Abducens
  7. Facial
  8. Vestibulocochlear
  9. Glossopharyngeal
  10. Vaugs
  11. Accessory
  12. Hypoglossal
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the mneumonic for the function of each cranial nerve?

A 
Some
Say
Marry
Money
But
My
Brother
Says
Big
Brains
Matter
Most
S = Sensory
M = Motor
B = Both
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Write some notes on the olfactory nerve:

A

Doesnt have specific nucleus in the brain that it projects to.

Has projects to the olfactory and limbic system. Hence smells can trigger memories and emotions.

Also projects to hypothalamus where no conscious sense of smell influences taste and satiety.

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

What is the main relay nucleus of the optic nerve?

A

lateral geniculate nucleus

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

What are the cranial nerves of eye movement?

A

Cranial nerves 3,4,6

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What happens if one of the cranial nerves involved in eye movement is damaged?

A

Then those muscles are no longer innovated and resultingly the eye moves in line with the direction of the functional cranial nerves i.e no longer neutral

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

Where are the nuclei of the occulomotor, trochlear and abducens cranial nerves?

A 
Occulomotor = Occulomotor nucleus (at sup. colliculus lvl)
Trochlear = Trochlear nerve (@midbrain level with inf. colliculus)
Abducens = Abducens nuclei (@pontomedullary junction in the pons)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Describe the trigeminal nerve:

A

Motor and sensory nerve.

Projects to the trigeminal ganglion and splits into three nerves;

Opthalmic nerve (V1) (Sensory)
Maxillary nerve (V2) (Sensory)
Mandibular nerve (V3) (Sensory and Motor)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What are the nuclei of the trigeminal nerve?

A

Mesocephalic nucleus; Located in midbrain, rostral pons. Functions as a proprioceptive pathway to regulate bite strength in response to proprioceptive info. Communicates to the trigeminal motor nucleus.

Principle sensory nucleus- mid pons, lateral to motor nucleus. ; proprioception, fine touch, vibration.

Spinal trigeminal sensory nucleus: Lateral tegmentum of medulla. Unusual in that it receives input from 7,9 and 10 cranial nerves as well regarding pain, temp and crude touch.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What are the nuclei of the facial nerve?

A

Facial motor nucleus
Solitary nucleus (sensory)
Sup. salivatory nucleus (ANS)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What are the nuclei of the vestibulocochlear nuceli?

A

Cochlear nuclei
Vestibular nuclei

Both sensory

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

What are the nuclei of the glossopharyngeal nuclei?

A

Inf. salivatory nucleus (PSN)

Solitary nucleus (Taste-sensory)
Dorsal motor nucleus and nucleus ambiguens (Motor)

Trigeminal sensory nucleus (Pain, temp)

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

What are the nuclei of the vagus nerve?

A

Nucleus ambiguens (as well as CN8) (Motor)

Dorsal nucleus of Vagus (ANS)

Solitary nucleus (Contains gustatory nucleus, all a sensory nucleus)

Spinal trigeminal nuclei (all general sensory info passes through this)

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

What cranial nerve nuclei recieves all general sensation?

A

Spinal trigeminal nuclei

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

What are the nuclei of the accessory nerve?

A

Accessory nuclei (located in spinal cord) (motor)

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

What are the nuclei of the hypoglossal nerve?

A

Hypoglossal nuclei (in midbrain) (motor)

17
Q

Describe the pathway of the optic nervee:

A

The optic nerve travels through the eye entering the optic chiasm and continuing through the optic tract to the lateral geniculate body. This sends optic projection fibers to the primary visual cortex

18
Q

What muscles does the occulomotor nerve control?

A 
Levator palpebrae superioris
Superior rectus
Medial Rectus
Inferior rectus
Inferior oblique
19
Q

What muscles does the trochlear nerve control?

A

Superior oblique

20
Q

What muscles does the abduces control?

A

Lateral recuts

21
Q

What is the function of the trigeminal nerve?

A

Mixed:

Sensory: Sensation from face, mouth and tongue (ant. 2/3)

Motor: Muscles of mastication

22
Q

What is the function of the facial nerve?

A

Mixed

Motor: Muscles of facial expression
PNS: Salivation, tear film
Sensory: Taste, Post 2/3 of tongue.

23
Q

Function of the vistubocochlear nerve?

A

Hearing, Balance, Spatial orientation

24
Q

Function of the glossopharyngeal nerve?`

A

Taste
Salivation
Arterial pressure, blood oxygen and CO2 (Carotid body and sinus)
Sensation of palate, tongue, middle ear

Muscles of larynx.

25
Q

What is the function of the vagus nerve?

A

Taste (back of throat)
Muscles of larynx and pharynx
Sensation: Outer ear, larynx
Sensation of Viscera and PNS

26
Q

Function of accessory nerve?

A

Muscles: Trapezius and sternocleidomastoid

27
Q

Function of hypoglossal nerve?

A

Muscles of the tongue

28
Q

How do the cranial nerves act in the corneal (blink) reflex?

A

Afferent: Trigeminal
Efferent: Facial nerve

29
Q

How do cranial nerves act in the pupillary light reflex?

A

Afferent: Optic nerve
Efferent: Occulomotor nerve

30
Q

How do cranial nerves act in the gag reflex?

A

Afferent: Glossoharyngeal nerve
Efferent: Vagus nerve

31
Q

A 45-year-old man is referred to the neurology clinic by his
primary care physician with right facial pain. He states that it is
a sharp shooting pain radiating over his right cheek. It is
exacerbated by chewing, brushing his teeth, and shaving. The
pain is intense and disrupts his activities of daily living. He is
otherwise healthy and there is no history of neurological
problems.

A

Trigeminal neuralgia

32
Q

Ms. Z, a 30-year-old pregnant female, recreational badminton
player, who spontaneously woke up with the inability to
voluntarily move the right side of her face, including the inability
to close her right eye, and slight drooping at the corner of her
mouth. She tried to explain to her husband what was
happening, but lacked the motor control to enunciate words.

A

Facial nerve, bells palsy

MBCHB3: Nervous system module. (39 decks)

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