N131 Lab 3

Front 1

Cranial nerve I

Origin

Back 1

Olfactory epithelium

(cranial nerve origin)

Front 2

Cranial nerve I

Function

Back 2

Smell

(cranial nerve function)

Front 3

Cranial Nerve II

Origin

Back 3

Retina of eye

(cranial nerve origin)

Front 4

Cranial Nerve II

Function

Back 4

Vision

(cranial nerve function)

Front 5

Cranial Nerve III

Origin

Back 5

Midbrain

(cranial nerve origin)

Front 6

Cranial Nerve III

Function

Back 6

1)eye movement (inferior oblique, and superior, inferior, and medial rectus muscles)

2)parasympathetic motor fibers to pupillary constrictor and ciliary muscles

(cranial nerve function)

Front 7

Cranial Nerve IV

Origin

Back 7

Midbrain

(cranial nerve origin)

Front 8

Cranial Nerve IV

Function

Back 8

Eye movement (superior oblique muscle)

(cranial nerve function)

Front 9

Cranial Nerve V

Origin

Back 9

Pons

(cranial nerve origin)

Front 10

Cranial Nerve V

Function

Back 10

Largest CN, supplies the face.

(Opthalmic) V1 - sensory for anterior scalp, upper eyelid, and nose

Maxillary (V2) - sensory for nasal cavity, palate, upper teeth, cheek, and eye areas.

Mandibular division (V3) - sensory for anterior tongue, lower teeth, chin, and temporal regions; motor for muscles of mastication

(cranial nerve function)

Front 11

Cranial Nerve VI

Origin

Back 11

Pons

(cranial nerve origin)

Front 12

Cranial Nerve VI

Function

Back 12

Eye movement (lateral rectus muscle)

(cranial nerve function)

Front 13

Cranial Nerve VII

Origin

Back 13

Pons

(cranial nerve origin)

Front 14

Cranial Nerve VII

Function

Back 14

1) Somatic motor innervation to muscles of facial expression
2) Parasympathetic motor innervation to lacrimal and salivary glands
3)Sensory for tastebuds on anterior 2/3 of tongue

(cranial nerve function)

Front 15

Cranial Nerve VIII

Origin

Back 15

Medulla

(cranial nerve origin)

Front 16

Cranial Nerve VIII

Function

Back 16

Balance (vestibular branch)

Hearing (cochlear branch)

(cranial nerve function)

Front 17

Cranial Nerve IX

Origin

Back 17

Medulla

(cranial nerve origin)

Front 18

Cranial Nerve IX

Function

Back 18

1)Sensory for taste and general sensation from posterior 1/3 of tongue and for pharynx

2) Somatic motor innervation of muscles of swallowing

3)Parasympathetic motor fibers to parotid glands

(cranial nerve function)

Front 19

Cranial Nerve X

Origin

Back 19

Medulla

(cranial nerve origin)

Front 20

Cranial Nerve X

Function

Back 20

- only CN to extend beyond head and neck

- muscles of swallowing and talking

- parasympathetic innervation to organs of cardiac, respiratory, and digestive system

- sensory for taste and external ear

(cranial nerve function)

Front 21

Cranial Nerve XI

Origin

Back 21

Medulla AND spinal roots C1-C5

(cranial nerve origin)

Front 22

Cranial Nerve XI

Function

Back 22

Innervates muscles of neck and upper back including SCM and trapezius

(cranial nerve function)

Front 23

Cranial Nerve XII

Origin

Back 23

Medulla

(Cranial nerve origin)

Front 24

Cranial Nerve XII

Function

Back 24

Innervates intrinsic and extrinsic tongue muscle.

(cranial nerve function)