Brain stem localization of motoneurons innervating the tensor tympani muscle in the rabbit A horseradish peroxidase study
- Resource Type
- Journal Article
- Authors
- A. Uchizono; E. Obata; K. Fukami; K. Murano; M. Ohyama; T. Nobori
- Source
- Ear Research Japan. 1984, 15(1):405
- Subject
- Language
- English
- ISSN
- 0288-9781
1884-5797
Motoneurons innervating the tensor tympani muscle in the rabbit were examined using the method of retrograde axonal transport of horseradish peroxidase (HRP).Injections of HRP into the tensor tympani muscle produced retrograde labeling of cells ipsilaterally. These labeled cells are clustered in the region ventral or vetrolateral to the trigeminal motor nucleus at its rostral half levels. A few labeled cells are seen extending in the portion rostral to the rostral pole of the nucleus. No labeled cells are observed within the trigeminal motor nucleus which is traditionally thought to innervate the tensor tympani muscle in the rabbit. The labeled cells are multipolar in shape and are smaller than cells in the trigeminal motor nucleus.From these results, it can be concluded that the cells innervating the tensor tympani muscle in the rabbit arise from the reticular region vetral or ventrolateral to the trigeminal motor nucleus proper.