title: Localization of masticatory motoneurons in the trigeminal motor nucleus of the guinea pig.
abstract: The myotopical arrangement of masticatory motoneurons was examined in the guinea pig by the horseradish peroxidase method. The trigeminal motor nucleus was composed of dorsolateral and ventromedial divisions; the former was seen in the whole rostrocaudal extent of the nucleus, while the latter was present at levels of the caudal two thirds of the nucleus. The jaw-closer motoneurons were located in the dorsolateral division, and the jaw-opener motoneurons (mylohyoid and anterior digastric motoneurons) were seen in the ventromedial division.
mesh_terms: D000818:Animals; D001370:Axonal Transport; D006168:Guinea Pigs; D006735:Horseradish Peroxidase; D008409:Mastication; D008410:Masticatory Muscles / Q000294:innervation*; D009046:Motor Neurons / Q000502:physiology*; D014278:Trigeminal Nuclei / Q000033:anatomy & histology*
chemical_list: D006735:Horseradish Peroxidase