CN in depth GT

CN I Olfactory n fiber type

SVA (chemoreceptor)

CN I Olfactory n nucleus location

N/A
Olfactory Bulb serves as its origin

CN I Olfactory n primary hole

cribiform foramina of cribriform plate

CN I Olfactory n function

smell

CN II optic n fiber type

SSA (photoreceptors)

CN II optic n nucleus location

Lateral Geniculate Nucleus of Thalamus

CN II optic n primary hole

optic canal

CN II optic n function

vision

CN III oculomotor n fiber type

GSE

GVE

CN III oculomotor n nucleus location

midbrain = oculomotor nucleus

midbrain = Edinger-Westphal

CN III oculomotor n primary hole

superior orbital fissue (SOF)

CN III oculomotor n function

Levator Palpebrae = SR, IR, MR, IO

Sphincter Pupillae (pupil constrictor) = ciliary muscle (lens accommodation)

CN IV trochlear n fiber type

GSE

CN IV trochlear n nucleus location

midbrain

CN IV trochlear n primary hole

SOF

CN IV trochlear n function

superior oblique (eye)

CN V trigeminal n has …

has nuclei along the MB-Pons-Medulla that are specific to sensation

CN V trigeminal V1 (opthalmic br) fiber type

GSA

CN V trigeminal V1 (opthalmic br) primary hole

SOF

CN V trigeminal V1 (opthalmic br) function

sensation upper face/scalp

CN V trigeminal V2 (maxillary br) fiber type

GSA

CN V trigeminal V2 (maxillary br) primary hole

foramen rotundum

CN V trigeminal V2 (maxillary br) function

sensation of maxillary region

CN V trigeminal V3 (mandibular br) fiber type

both GSA and SVE (BE)

CN V trigeminal V3 (mandibular br) nucleus location

Pons = motor nucleus of V (for BE)

CN V trigeminal V3 (mandibular br) primary hole

foramen ovale

CN V trigeminal V3 (mandibular br) function

GSA = Sensation to mandibular region including
anterior tongue

BE = Muscle of Mastication, Temporalis, Tensor
Tympani

CN VI abducens fiber type

GSE

CN VI abducens nucleus location

Pons = Nucleus of Abducens

CN VI abducens primary hole

SOF

CN VI abducens function

lateral rectus (eye)

CN VII facial n fiber type

1. SVE (BE)

2. GVE

3. GSA

4. SVA

CN VII facial n nucleus location

1. BE = pons = facial motor nucleus

2. GVE = pons = superior salivatory

3. GSA = lower pons/medulla

4. SVA = medulla

CN VII facial n primary hole

internal acoustic meatus (for all fiber types)

CN VII facial n function

1. SVE (BE) = muscles of facial expression = some suprahyoid muscles of neck, stapedius, temporal branch, zygomatic branch, buccal branch, mandibular, cervica

2. GVE = lacrimal gland, nasal/oral mucosa (secretions), submandibular salivary gland, sublingual salivary gland

3. GSA = sensation of external acoustic meatus

4. SVA = taste anterior tongue (to insula)

CN VIII vestibulocochlear n fiber type

SSA

CN VIII vestibulocochlear n nucleus location

medulla = vestibulocochlear nuclei

CN VIII vestibulocochlear n primary hole

internal acoustic meatus

CN VIII vestibulocochlear n function

auditory/balance

CN IX glossopharyngeal n fiber type

1.GVE

2.SVE (BE)

3.GVA
4.SVA
5.GSA

CN IX glossopharyngeal n nucleus location

1. GVE = medulla = inferior salivatory nucleus

2. SVE (BE) = nucleus ambiguus

3. GVA = nucleus of solitary tract

4. SVA = nucleus of solitary tract

5. GSA = spinal trigeminal

CN IX glossopharyngeal n primary hole

jugular foramen (for all of them)

CN IX glossopharyngeal n function

1. GVE = parotid salivary gland

2. SVE (BE) = stylopharyngeus muscle (swallow)

3. GVA = carotid sinus, BP control and pH detection

4. SVA = taste posterior tongue (to insula)

5. GSA = oropharynx, posterior tongue sensation, middle ear sensation

CN X vagus n fiber type

1. SVE(BE)

2. GVE

3. GSA

4. SVA

5. GVA

CN X vagus n nucleus location

1. SVE(BE) = medulla

2. GVE = dorsal motor nucleus

3. GSA = spinal trigeminal

4. SVA = Nucleus of Solitary Tract

5. GVA = Nucleus of Solitary Tract

CN X vagus n primary hole

jugular foramen (all of them)

CN X vagus n function

1. SVE(BE) = Laryngo-Pharyngeal muscles (phonation/swallowing)

2. GVE = Viscera to Left Flexure of large intestine

3. GSA = Sensation to inferior external acoustic meatus, concha, pharynx-larynx, tympanic membrane

4. SVA = Root of tongue and epiglottis

5. GVA = Sensation Viscera to Left Flexure of large intestine

CN XI spinal accessory n fiber type

GSE

CN XI spinal accessory n nucleus location

spinal cord

CN XI spinal accessory n primary hole

Foramen Magnum UP into jugular foramen OUT
to effectors

CN XI spinal accessory n function

sternocleidomastoid, trapezius

CN XII hypoglossal n fiber type

GSE

CN XII hypoglossal n nucleus location

medulla, hypoglossal nucleus

CN XII hypoglossal n primary hole

hypoglossal canal

CN XII hypoglossal n function

muscles of tongue