Neuroanatomy Exam 2 Control of Head and Neck

general sensation, visceral sensation, vision, balance, hearing, smell, and taste is

sensory

somatic striated muscle, glands and smooth muscle, and branchial arch striated muscle is

motor

sensory information from the skin and mucose in head (GSA)

VII, IX, and X

sensory from the viscera of head and neck (GVA)

IX and X

carrying taste (SVA)

VII, IX, and X

hearing and balance (SSA)

VIII

motor innervation to skeletal muscles dervied from somities (GSE)

III, IV, and XII

parasympathetic innervation of glands in head and neck (GVE)

VII, IX, and X

motor innervation to skeletal muscles from pharyngeal arches (SVE)

V, VII, IX, X, XI

motor nucleus - muscles of mastication

trigeminal

what are the 3 sensory nuclei of GSA

-pain and temperature on face and inside mouth

-discriminative touch on face and inside mouth

-proprioception of temporomandibular joint

what nerve is the main sensory innervation for face

trigeminal

what are the three division of the trigeminal nerve

ophthalmic

maxillary

mandibular

V1:

upper face, orbit, cornea

V2:

midface and upper teeth

V3:

lower face and teeth

general sensation for anterior 2/3 of tongue

trigeminal; mandibular branch

TRIGEMINAL PATHWAYS: bilateral sensory innervation - information from each divsion reaches both sides of the brain except for

inside of mouth; ipsilateral

how many nuclei are associated with the facial nerve

4

what are the four associated nuclei to the facial nerve

motor innervation to muscles of facial expression

parasympathetic innervation to lacrimal, submandibular, and sublingual glands

taste for anterior 2/3 of tongue

carries pain and temperature from outer ear

where is teh facial nucleus located

caudal pons

upper face is what kind of input

bilateral

lower face is what kind of input

contralateral

upper motor neurons (CBT) affects what facial region

lower face

lower motor neurons affects what region of the face

whole side of face on same side

CBT input to lower face is from

contralateral motor cortex

what are the motor branches of the facial nerve

temporal

posterior auricular

zygomatic

buccal

cervical

marginal mandibular

bell palsy is what motor neuron damage

lower motor neuron

what modilaties does the glossopharyngeal nerve do

blood gas regulation

blood pressure

taste

senstion from posterior 1/3 tongue and upper pharynx (gag reflex)

what are the different modalities of the vagus nerve

controls smooth muscle and glands

slow down cardiac muscles

pharyngeal muscles and intrinsic muscles of the larynx

monitior blood pressure

coughting and vomiting reflex

pain, temperature, and crude touch from vocal folds, larynx, skin or external ear, etc

spinal accerssory nerve arises from

the medulla and the first 6 spinal cord segments

what cranial nerve is purley motor

spinal accessory and hypoglossal

what does the spinal accessory innervate

trapezius (contralateral) and sternocleidomastoid (ipsilateral) muscles

where is the hypoglossal nucleus

medulla

UMN lesion of hypoglossal nerve:

tongue deviates to opposite side

LMN lesion of hypoglossal nerve:

tongue deviates to same side