Trigeminal System Flashcards
functions of CN V: trigeminal
- pain & temperature from face
- touch from face
- proprioception from face
- motor to mastication muscles
name the 3 peripheral branches of CN V and indicate sensory/motor
V1 ophthalamic (S)
V2 maxillary (S)
V3 mandibular (S+M)
where is the trigeminal lemniscus located relative to the medial lemniscus?
posterior
what is the cell body of primary afferents that carry P&T from the face?
trigeminal ganglion
what is the cell body of primary afferents that carry proprioception from the face?
mesencephalic nucleus
(midpons to midbrain)
what is the cell body of primary afferents that carry touch from the face?
trigeminal ganglion
what is the cell body of the fibers that carry motor to mastication muscles?
motor nucleus of trigeminal
(midpons)
primary afferents carrying P&T from the face enter the ____ and synapse with ____
spinal tract of trigeminal (midpons-C5)
Nucleus of spinal tract of trigeminal
secondary axons carrying P&T from the face…
- cross at midline, all levels of brainstem
- form trigeminal lemniscus
- end in thalamus
what type of of fibers carry pain & temperature from the face?
A-delta or C fibers
primary afferents that carry touch from the face synapse with ____
chief sensory nucleus of trigeminal (midpons)
secondary axons carrying touch from the face…
cross and join the trigeminal lemniscus to the thalamus
what type of fibers carry touch from the face?
A-alpha/beta
primary afferents carrying proprioception from the face enter the…
trigeminal nerve
(mesencephalic nucleus is located within pons)
primary afferents that carry proprioception from the face synapse with…
cell bodies in reticular formation
