Point 17
Motor V
Sensory V
Discriminatory touch, as well as conscious proprioception and vibration information from the face do not "use" the spinal tract and nucleus V. Instead, they pass into the CHIEF SENSORY NUCLEUS (or principal sensory V). This nucleus lies LATERAL to motor V (Motor=Medial) in the pons at the level of the entering (and exiting) C.N. V fibers. Axons of cells in the chief sensory nucleus V cross and pass rostrally in the trigeminothalamic tract (TTT; along with the pain and temperature fibers from the spinal nucleus V) to the ventral posteromedial (VPM) nucleus of the thalamus.
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