The parts of the trigeminal nucleus receive different types of sensory information; the spinal trigeminal nucleus receives pain-temperature fibers, the principal sensory nucleus receives touch-position fibers and the mesencephalic nucleus receives proprioceptor and mechanoreceptor fibers from the jaws and teeth.
22.
Electrical synapses are present throughout the central nervous system and have been studied specifically in the neocortex, hippocampus, thalamic reticular nucleus, locus coeruleus, inferior olivary nucleus, mesencephalic nucleus of the trigeminal nerve, olfactory bulb, retina, and spinal cord of vertebrates.
23.
The "'midbrain reticular formation ( MRF; mesencephalic reticular formation; tegmental reticular formation; formatio reticularis ( tegmenti ) mesencephali ) "'is a structure in the midbrain consisting of the dorsal tegmental nucleus, ventral tegmental nucleus, and cuneiform nucleus.
24.
First the ascending mesencephalic tegmentum, subthalamus and hypothalamus to the internal capsule . The latter was of particular interest, as this series of relays did not correspond to any known anatomical pathways for the wakefulness signal transduction and was coined the " ascending reticular activating system " ( ARAS ).
25.
However, it should be noted that FoxP2 expression is found in several nearby brain regions ( not including the locus coeruleus, mesencephalic nucleus of the trigeminal, or laterodorsal tegmental nucleus ), so it is not unique to the pre-LC . That is, every pre-LC neuron expresses FoxP2, but not every neuron that expresses FoxP2 is part of the pre-LC.
26.
The portion of the midbrain from where this tract originates is the superior colliculus, which receives afferents from the visual nuclei ( primarily the oculomotor nuclei complex ), then projects to the contralateral ( decussating dorsal to the mesencephalic duct ) and ipsilateral portion of the first cervical neuromeres of the spinal cord, the oculomotor and trochlear nuclei in the midbrain and the abducens nucleus in the caudal portion of the pons.
