Trigeminal nerve, mesencephalic nucleus

Midhrain and brainstem ventral tegmental area raphe nuclei superior cerebellar peduncle mesencephalic nucleus of trigeminal nerve substantia nigra nucleus coeruleus periaqueductal grey... 

Actually, unipolar neurons have two axons rather than an axon and dendrite (Figure 14.3). Mostintemeurons, which form all the neural wiring within the CNS, are of this type. Examples include spinal ganglia, most cranial nerve sensory ganglia, and the trigeminal mesencephalic nucleus. Dorsal root ganglia cells extend one axon centrally toward the spinal cord, and the other axon toward the skin or muscle. 

In the NT-3 knockout mice, most sensory neuron populations were reduced in number. These alterations affected several sensory modalities, including somatosensory information processed by the DRGs and by the trigeminal ganglion, interoceptive visceral information conveyed by petrose-nodose ganglion cells and propioceptive information processed by DRG neurons and by the mesencephalic nucleus of the trigeminal nerve. During normal development, innervation of skeletal muscle by la and Ib DRG neurons induces formation... 

Mesencephalic nucleus of the trigeminal nerve Colonnier et al. (1979) Insensitive to kainate... 

Fig. 6. Autoradiographic localization of a-1 and a-2 adrenoceptors in the area of the locus coeruleus. Frame (B) is a bright-field micrograph showing the cerebellum (CB), the mesencephalic nucleus of the trigeminal nerve (NTM), and the locus coeruleus (asterisk is placed immediately to its right). Bar = 100 pm. In (A), the a-2 adrenoceptor distribution (receptors labeled with [ HJclonidine) is shown. Note the strikingly high level of a-2 adrenoceptors in the locus coeruleus. By contrast, the a-1 receptors shown in (C) are not elevated in the locus coeruleus. Blanks are shown in (D) for a-2 receptors and in (E) for a-1 receptors. Note that the level of a-1 adrenoceptors in (C) is quite close to the blank value shown in (E). (Reproduced from Young and Kuhar, 1980o.)...

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