CN V Flashcards
CN V - ______
trigeminal nerve
CN V is the _____ CN
largest
function of CN V
motor and sensory
what are the 3 divisions
V1 - ophthalmic
V2 - maxillary
V3 - mandibular
GSA of V1
cornea, skin of forehead, scalp, eyelids, and nose
mucous membrane of paranasal sinuses and nasal cavity
exit of V1
sup orbital fissure
exit of V2
foramen rotundum
GSA of V2
skin of face over maxilla
teeth of upper jaw
mucous membrane of nose, maxillary sinus and palate
GSA of V3
skin of cheek, skin over mandible and side of head, teeth of lower jaw and TMJ
mucous membrane of mouth and anterior part of tongue
SVE of V3
muscles of mastication mylohyoid, anterior belly digastric muscle, tensor palatini and tensor tympani
exit of V3
foramen ovale
trigeminal nuclei receive GSA inputs from _____
CN V, VII, IX and X
lies in posterior part of pons, lateral to motor nucleus
main sensory nucleus
main sensory nucleus is for fine touch, dental pressure through _____
trigeminal lemniscus to VPM
trigeminal nucleus crosses to opposite side of the brainstem to ascend with the ____ towards _____
ascend with the medial lemniscus towards the thalamus to VPM
smaller pathway that does not decussate and travel to ipsilateral VPM
Dorsal Trigeminothalamic Tract
_____ travel to face area of primary sensory area
tertiary neurons
Dorsal Trigeminothalamic Tract conveys
touch and pressure sensation from oral cavity including teeth
Spinal Nucleus extends as far as _____
C2 segment
Crude touch, pain and temperature through ______
trigeminothalamic tract to VPM
column of unipolar cells in the lateral part of the periaqueductal gray matter
mesencephalic nuc
mesencephalic nuc function
Proprioception from muscles of mastication, tongue and possibly from EOMs
found in upper to mid pons near the level of trigeminal nerve exit from brainstem
motor nuc
motor nuc ise medial to _____
main sensory nucleus
motor root runs inferomedial to trigeminal ganglion floor of ______ then joins V3 to exit via foramen ovale
Meckel’s cave
motor nuc supplies ____
muscles of mastication and smaller muscles (tensor tympani, tensor veli palatini, mylohyoid and anterior belly of digastric)
small fossa just posterior and inferolateral to cavernous sinus
Meckel’s cave
arise from anterior border of the ganglion
Ophthalmic, maxillary and mandibular nerves
half of trigeminal senosry ganglion divide to ascending and descending fibers as they enter the
pons
anseding branches terminate in
main sensory nucleus
anseding branches is for
Touch and pressure
descending branches terminate
spinal nucleus
descending branches is for
Pain and temperature
V1 terminates
inferior part of spinal nucleus
V2 termiantes
middle part of spinal nucleus
V3 terminates
superior part of spinal nucleus
fibers from mesencephalic nucleus formi
monosynaptic reflex arc
