the cranial nerves Flashcards by Imogen Adam | Brainscape

Q

what is CN I (olfactory nerve) responsible for

A

olfaction/smell

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Q

what is the CN II (optic nerve) responsible for

A

vision/sight

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Q

what is the CN III (vestibulo-cochlear nerve) responsible for

A

balance and hearing

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Q

what do dorsal roots innervate

A

all structures

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Q

what do ventral roots innervate

A

somites

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Q

how many pharyngeal arches are there in segment 1

A

0

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Q

how many pharyngeal arches are there in segment 2

A

1

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Q

how many pharyngeal arches are there in segment 3

A

2

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Q

how many pharyngeal arches are there in segment 4

A

3

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Q

how many pharyngeal arches are there in segment 5

A

4

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Q

how many pharyngeal arches are there in segment 6

A

5

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Q

how many pharyngeal arches are there in segment 7

A

6

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Q

what is the ventral root nerve for segment 1

A

III occulomotor

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Q

what is the ventral root nerve for segment 2

A

IV trochlear

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Q

what is the ventral root nerve for segment 3

A

VI abducent

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Q

what is the ventral root nerve for segment 4

A

none

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Q

what is the ventral root nerve for segment 5

A

none

Q

what is the ventral root nerve for segment 6 + 7

A

XII hypoglossal

Q

somite of segment 1

A

most orbital muscles

Q

somite of segment 2

A

dorsal oblique

Q

somite of segment 3

A

lateral rectus and retractor

Q

somite of segment 4 + 5

A

none

Q

somite of segment 6 + 7

A

somites migrate to form tongue muscles

Q

dorsal root nerve of segment 1

A

V trigeminal (opthalmic)

Q

dorsal root nerve of segment 2

A

V trigeminal (maxillary and mandibular)

Q

dorsal root nerve of segment 3

A

VII facial

Q

dorsal root nerve of segment 4

A

IX glosso-pharyngeal

Q

dorsal root nerve of segment 5

A

X/XI vagal-accessory complex

Q

dorsal root nerve of segment 6

A

none

Q

dorsal root nerve of segment 7

A

X/XI vagal accessory complex

Q

ectoderm of segment 1

A

skin of top of head

Q

ectoderm of segment 2

A

skin of face
rostral 2/3 of tongue

Q

ectoderm of segment 3,4,5

A

negligible

Q

ectoderm of segment 6 and 7

A

none

Q

endoderm of segment 1+2

A

none

Q

endoderm of segment 3

A

thyroid gland

Q

endoderm of segment 4

A

pharynx
caudal 1/3 of tongue
carotid body/sinus

Q

endoderm of segment 5

A

rostral larynx
common pharynx

Q

endoderm of segment 6

A

none

Q

ectoderm of segment 7

A

caudal larynx, oesophagus
respiratory