Neuro Flashcards
CN VII CBO that’s facial motor nucleus
SVE
CN VII CBO that’s superior salivatory nucleus, submandibular & pterygopalatine ganglia
GVE
CN VII CBO that’s geniculate ganglion – trigeminal spinal nucleus
GSA
CN VII CBO that’s geniculate ganglion – spiral nucleus (TWO)
SVA & GVA
CN VII functional component for mm. of facial expression
SVE
CN VII functional component for lacrimal, nasal & oral mucosal, salivary glands
GVE
CN VII functional component for sensory of the skin of the ear
GSA
CN VII functional component for sensory anterior 2/3 of tongue (chorda tympani)
SVA
CN VII functional component for palatine tonsil & posterior nasal cavity
GVA
CN VII shares CBO solitary nucleus for taste with CN ___ and ___
CN IX and X
CN VII shares CBO trigeminal spinal nucleus for inner ear mm with CN ___
CN IX
CN VII shares CBO trigeminal spinal nucleus for outer ear pain, touch, temp with CN ___
CN X
Nerve involved with closing eye:
opening eye:
CN VII (temporal branch) CN III
Visceral afferent structures served by CN VII
- Anterior 2/3 of tongue
- Palatine tonsil, posterior nasal cavity
CN VII p-symp ganglion that innervate glands
Pterygopalatine and submandibular ganglion
Pterygopalatine ganglion of CN VII innervates which 3 glands:
lacrimal, nasal & oral mucosal
Submandibular ganglion of CN VII innervates which 2 glands:
submandibular salivary, sublingual salivary
What is Bell’s palsy and what are the symptoms:
Acute facial nerve paralysis.
Hyperacusis, reduced salivation and lacrimation, numbness of ear/ tongue/ face
Effect of lesion of CN VII in internal auditory canal:
complete inactivation of CN VII
Effect of lesion of CN VII in facial canal
inactivation of chorda tympani & facial n. branches. No taste, no facial mm. movement
Effect of lesion of CN VII at the stylomastoid foramen
no movement of facial mm.
Symptoms of lesion of a the corticobulbar fibers :
paralysis of facial mm. below eye level to OPPOSITE side of face
CN V CBO that’s trigeminal motor nucleus
SVE
CN V CBO that’s trigeminal mesncephalic nucleus (specific E or P)
GSA-p
CN V CBO that’s trigeminal spinal nucleus (specific E or P)
GSA-e
CN V functional component for muscles of mastication
SVE
CN V functional component for neuromuscular spindles of mm. of mastication , tension receptors in perio ligaments (specific E or P)
GSA-p
CN V functional component for skin in face, oronasal mucous membrane, teeth, dura mater (specific E or P)
GSA-e
subdivisions of CN V
V1 - opthalmic
V2 - maxillary
V3 - mandibular
4 trigeminal nuclei:
Which 3 are located in the pons and which one is in the midbrain?
- Trigeminal spinal nucleus
- Trigeminal principal sensory nucleus
- Trigeminal motor nucleus
- Trigeminal mesencephalic nucleus (MIDBRAIN)
Which trigeminal nucleus is special and why?
Mesencephalic.
Consists fo unipolar cells of neural crest origin. Axons are scattered on either side of t.m. tract to supratrig. nucleus or to nerve
3 other CN’s (besides CN V) that contribute axons to the trigeminal spinal tract
CN VII, IX, X
2 ascending projections from the trigeminal sensory nuclei and where do they terminate
Anterior and Posterior trigeminothalamic tracts.
Sensory cortex of postcentral gyrus
ANTERIOR trigeminothalamic tract function and termination area
pain, touch, temp from face/head/neck
POSTERIOR trigeminothalamic tract function
pressure, discrimination touch from Meissner’s and Pacinian corpuscles
Direct vs. Consensual Corneal reflex ____ cornea and which one closes the eye on opposite side
stimulate
Consensual=opposite side
Jaw-jerk reflex… upper motor neuron lesion ___ while LMNL ____
increases
decreases
Jaw-jerk reflex.. ___ sense stretching while __ travels to mm. of mastication to close jaw
GSAp
SVE trigeminal motor nucleus
Trigeminal neuralgia
severe facial pain due to compression of trigeminal nerve, may be due to dilated vessels
Trigeminal tractotomy (cure for trigeminal neuralgia)
microvasular decompression (old school way)
descending trigeminal tract shocked with electrodes
Trigeminal mesencephalic nucleus function:
principal sensory:
spinal nucleus:
- proprioception
- discriminative touch
- pain, crude touch, temp
Raphe nuclei location:
midbrain, pons, medulla
Midbrain raphe nuclei project to:
cerebral cortex