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Flashcards in Lecture 6 Deck (15):
1

What are the 12 cranial nerves?

OOOTTAFVGVAH
Oh oh oh to touch and feel virgin girl's vagina and hymen

Olfactory
Optic
Oculomotor
Trochlear
Trigeminal
Abducens
Facial
Vestibulocochlear
Glossopharyngeal
Vagus
Accessory
Hypoglossal

2

Which cranial nerves do NOT arise from the brainstem?

1 and 2

3

Which embryologic structures give rise to the sensory vs motor nuclei? What is the structure that divides these two areas?

Sulcus limitans
Alar plate = more lateral = sensory nuclei
Basal plate = more medial = motor nuclei

4

Where are sensory and motor nuclei located in the spinal cord vs brainstem?

Motor:
- Anterior @ spinal cord
- Medial @ brain stem
Sensory:
- Posterior @ spinal cord
- Lateral @ brain stem

5

Do nuclei terminate or originate from sensory vs motor nuclei?

Sensory = "nuclei of termination"
Motor = "nuclei of origin"

6

What is the role of oculomotor specifically and is it sensory/motor/both? How many nuclei does this CN have associated with it?

MOTOR
2 nuclei:
Oculomotor - most eye muscles
Edinger Westphal - parasympa

7

What is the role of trochlear specifically and is it sensory/motor/both? How many nuclei does this CN have associated with it?

MOTOR
1 nucleus:
Trochlear - superior oblique muscle

8

What is the role of trigmeninal specifically and is it sensory/motor/both? How many nuclei does this CN have associated with it?

4 nuclei
MOTOR = motor trigeminal - muscles of MAST
SENSORY
Mescencephalic - input from MAST
Principal - touch info
Spinal trigeminal - pain & temp

9

What is the role of abducens specifically and is it sensory/motor/both? How many nuclei does this CN have associated with it?

1 nucleus
MOTOR - abducens - lateral rectus eye muscle

10

What is the role of facial specifically and is it sensory/motor/both? How many nuclei does this CN have associated with it?

4 nuclei
MOTOR
Facial - muscles of facial expression
Salivatory - parasympa
SENSORY
Spinal trigeminal - around ear
Solitary - tongue and palate

11

What is the role of vestibulocochlear specifically and is it sensory/motor/both? How many nuclei does this CN have associated with it?

2 nuclei
SENSORY
Vestibular - from semicircular canals
Cochlear - from cochlea

12

What is the role of glossopharyngeal specifically and is it sensory/motor/both? How many nuclei does this CN have associated with it?

4 nuclei
MOTOR
Ambiguous - most glossal and pharynx
Salivatory - parasym
SENSORY
Solitary - carotid body, tongue
Spinal trigeminal - tongue, ear

13

What is the role of vagus specifically and is it sensory/motor/both? How many nuclei does this CN have associated with it?

4 nuclei
MOTOR
Ambiguous - pharynx, larynx, tongue
Dorsal vagal - smooth muscle
SENSORY
Solitary
Spinal trigeminal

14

What is the role of accessory specifically and is it sensory/motor/both? How many nuclei does this CN have associated with it?

1 nucleus
MOTOR - spinal accessory - to neck/shoulder muscles

15

What is the role of hypoglossal specifically and is it sensory/motor/both? How many nuclei does this CN have associated with it?

1 nucleus
MOTOR - hypoglossal - tongue muscles