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Projections from the caudal spinal trigeminal nucleus to commissural interneurons in the supratrigeminal region: an
1Department of Morphological Brain Science, Graduate School of Medicine, Kyoto University, Japan.
Neuroscience Letters
|October 21, 1998
Abstract:
Electron microscopic double-labeling study in the rat indicated that projection fibers from the caudal spinal trigeminal nucleus (Vc) were distributed ipsilaterally within the supratrigeminal region (STR) capping the trigeminal motor nucleus (Tm) and made synaptic contact with neurons projecting to the contralateral Tm. Nociceptive inputs to the Vc may reflexly control, via interneurons in the STR, the activities of Tm neurons innervating the masticatory, tensor tympani, and/or tensor veli palatine muscles.