Cranial Nerve Nuclei + Brainstem

CN III (oculomotor)

which CN is associated with the Edinger Westphal nucleus

CN III (oculomotor)

which CN is associated with the oculomotor nucleus

CN IV (trochlear)

which CN is associated with the trochlear nucleus

CN V (trigeminal)

which CN is associated with the motor nucleus of trigeminal

CN VI (abducens)

which CN is associated with the abducens nucleus

CN VII (facial)

which CN is associated with the facial nucleus

CN VII (facial)

which CN is associated with the superior salivatory nucleus

CN IX (glossopharyngeal)

which CN is associated with the inferior salivatory nucleus

CN IX (glossopharyngeal) and CN X (vagus)

which CN is associated with the nucleus ambiguous

CN X (vagus)

which CN is associated with the dorsal motor nucleus

CN XII (hypoglossal)

which CN is associated with the hypoglossal nucleus

CN V (trigeminal)

which CN is associated with the mesencephalic nucleus

CN V (trigeminal)

which CN is associated with the main sensory nucleus of trigeminal and spinal nucleus of trigeminal

CN VIII (vestibulocochlear)

which CN is associated with the cochlear nucleus

CN VIII (vestibulocochlear)

which CN is associated with the vestibular nucleus

CN VII (facial), CN IX (glossopharyngeal), and CN X (vagus)

which CN is associated with the solitary nucleus

Edinger Westphal nucleus, oculomotor nucleus

list the nuclei associated with CN III (oculomotor)

trochlear nucleus

list the nuclei associated with CN IV (trochlear)

motor nucleus of trigeminal, mesencephalic nucleus, main sensory nucleus of trigeminal, spinal nucleus of trigeminal

list the nuclei associated with CN V (trigeminal)

abducens nucleus

list the nuclei associated with CN VI (abducens)

facial nucleus, superior salivatory nucleus, solitary nucleus, spinal nucleus of trigeminal

list the nuclei associated with CN VII (facial)

inferior salivatory nucleus, nucleus ambiguous, solitary nucleus, spinal nucleus of trigeminal

list the nuclei associated with CN IX (glossopharyngeal)

nucleus ambiguous, dorsal motor nucleus, solitary nucleus, spinal nucleus of trigeminal

list the nuclei associated with CN X (vagus)

hypoglossal nucleus

list the nuclei associated with CN XII (hypoglossal)

cochlear nucleus, vestibular nucleus

list the nuclei associated with CN VIII (vestibulocochlear)

upper face: presents normally; lower face: contralateral face droop

s/s of an UMN injury to the facial n.

patient presents with little to no facial expression on the ipsilateral side and the angle of the mouth droops on the affected side; other s/s: patient cannot whistle or close the affected eye (loss of corneal blink reflex), hyperacusis (due to paralysis of stapedius mm), loss of taste from anterior 2/3 of tongue, dry mouth, and loss of somesthetic sensation from ear canal

s/s of a LMN injury to the facial n.

UMN injury

a stroke is a(n): UMN injury or LMN injury

LMN injury

Bell’s Palsy is a(n): UMN injury or LMN injury

hyperacusis

this term means an increased sensitivity to sound and is a symptom of Bell’s Palsy

Edinger Westphal nucleus

this nucleus is responsible for pupillary constriction and lens accommodation

oculomotor nucleus

this nucleus is responsible for the extraocular eye movement and innervating the levator palpebrae

trochlear nucleus

this nucleus is responsible for innervating the superior oblique muscle

motor nucleus of trigeminal

this nucleus is responsible for innervating the muscles of mastication

abducens nucleus

this nucleus is responsible for innervating the lateral rectus muscle which is responsible for eye abduction

facial nucleus

this nucleus is responsible for innervating muscles of facial expression and stapedius

superior salivatory nucleus

this nucleus is responsible for innervating the submandibular, lacrimal, and sublingual glands

inferior salivatory nucleus

this nucleus is responsible for innervating the parotid gland

nucleus ambiguous

this nucleus is responsible for innervating the stylopharyngeal muscle and the muscles of the soft palate, pharynx, and larynx

dorsal motor nucleus

this nucleus is responsible for the parasympathetic nerve function of the heart, lungs, and GI tract

hypoglossal nucleus

this nucleus is responsible for innervating tongue muscles

• vestibular system (balance) - vestibular nucleus

• hearing/cochlea - cochlear nucleus

list the functions of CN VIII (vestibulocochlear) and the nuclei associated with each function

• pupillary constriction - Edinger Westphal nucleus

• lens accommodation - Edinger Westphal nucleus

• majority of extrocular eye muscles - oculomotor nucleus

• levator palpebrae - oculomotor nucleus

list the functions of CN III (oculomotor) and the nuclei associated with each function

• innervates superior oblique muscle - trochlear nucleus

list the functions of CN IV (trochlear) and the nuclei associated with each function

• innervates lateral rectus muscle - abducens nucleus

list the functions of CN VI (abducens) and the nuclei associated with each function

• innervates tongue muscles - hypoglossal nucleus

list the functions of CN XII (hypoglossal) and the nuclei associated with each function

• general sensation of face, external ear, cornea, nasal and oral cavities, anterior 2/3 of tongue - main sensory nucleus of trigeminal and spinal nucleus of trigeminal

• proprioception information fro muscles of mastication - mesencephalic nucleus

• innervates muscles of mastication - motor nucleus of trigeminal

list the functions of CN V (trigeminal) and the nuclei associated with each function

• innervates muscles of facial expression and stapedius - facial nucleus

• innervates lacrimal, sublingual, and submandibular glands - superior salivatory nucleus

• general sensation of ear canal - spinal nucleus of trigeminal

• taste of anterior 2/3 of tongue - solitary nucleus

list the functions of CN VII (facial) and the nuclei associated with each function

• general sensation of posterior 1/3 of tongue, nasal and oropharynx, and middle ear - spinal nucleus of trigeminal

• innervates the stylopharyngeal muscle - nucleus ambiguous

• taste of the posterior 1/3 of tongue - solitary nucleus

• innervates the parotid gland - inferior salivatory nucleus

• innervates the carotid body - solitary nucleus

list the functions of CN IX (glossopharyngeal) and the nuclei associated with each function

• innervates muscles of the pharynx, larynx, and soft palate - nucleus ambiguous

• parasympathetic nerve function of heart, lungs, GI tract - dorsal motor nucleus

• general sensation of larynx and epiglottis - spinal nucleus of trigeminal

• taste from the base of tongue and epiglottis - solitary nucleus

• visceral sensation from heart, lungs, GI tract - solitary nucleus

list the functions of CN X (vagus) and the nuclei associated with each function

inferior cerebellar peduncle

which cerebellar peduncle is associated with the medulla

CN XII, CN X, CN IX

the medulla houses CN nuclei for which CN

medulla

in which part of the brainstem is the inferior olivary nucleus found

inferior olivary nucleus

this nucleus coordinates signals from the SC to the cerebellum and regulates motor coordination and motor learning; neurons here are a major input to the cerebellum

hypoglossal nucleus, dorsal motor nucleus, nucleus ambiguous

list the motor nuclei found in the medulla

inferior olivary nucleus, vestibular nucleus, solitary nucleus, spinal nucleus of trigeminal

list the sensory nuclei found in the medulla

superior cerebellar peduncle, middle cerebellar peduncle, inferior cerebellar peduncle

which cerebellar peduncle is associated with the pons

CN V, CN VI, CN VII, CN VIII

the pons houses CN nuclei for which CN

abducens nucleus, facial nucleus, spinal nucleus of trigeminal, vestibular nucleus

list the CN nuclei found in the pons

superior cerebellar peduncle

which cerebellar peduncle is associated with the midbrain

CN IV, CN III

the midbrain houses CN nuclei for which CN

Edinger Westphal nucleus, oculomotor nucleus, trochlear nucleus

list the CN nuclei found in the midbrain

STT, trigeminothalamic tract, medial lemniscus, spinal tract of CN V, sympathetic tract

list the ascending tracts (5) found in the medulla

medial lemniscus, STT, trigeminothalamic tract

list the ascending tracts (3) found in the pons

medial lemniscus, medial geniculate, superior colliculus, trigeminothalamic tract, STT

list the ascending tracts (5) found in the midbrain

corticospinal tract, corticobulbar tract, rubrospinal tract, MLF

list the descending tracts (4) found in the medulla

corticospinal tract

list the descending tracts found in the pons

cerebral peduncle (corticospinal and corticobulbar), MLF

list the descending tracts (2) found in the midbrain

midbrain

the substantia nigra is found in which part of the brainstem

pons

the 4th ventricle is found in which part of the brainstem

midbrain

the cerebral aqueduct is found in which part of the brainstem