Author:
Mizuno Noboru,Konishi Akira,Sato Manabu
Abstract
AbstractTopographical localization of motoneurons supplying the masticatory muscles was investigated in the cat and rat, utilizing retrograde axonal transport of horseradish peroxidase. Following injection of horseradish peroxidase in each masticatory muscle, motoneurons labelled with peroxidase were seen to be aggregated into a cluster within the motor nucleus of the trigeminal nerve. Such clusters of peroxidase‐labelled motoneurons innervating each masticatory muscle were demarcated more sharply in kittens than in adult animals. The pattern of the nuclear representation of the masticatory muscles was found to be essentially the same in the cat and rat; it could be summarized as follows:The motor nucleus of the trigeminal nerve could be divided cytoarchitectonically into the dorsolateral and ventromedial divisions; the former was seen in almost the whole rostrocaudal extent of the nucleus, while the latter was localized at the levels of caudal two thirds of the nucleus. In the dorsolateral division, the temporal muscle was represented dorsally and dorsomedially, the masseter muscle ventrolaterally, and the pterygoid muscles ventromedially. In the ventromedial division, the anterior digastric muscle was represented dorso medially, and the mylohyoid muscle ventrolaterally. It was also confirmed that the motoneurons supplying the posterior digastric muscle were localized in the accessory facial nucleus.
Reference27 articles.
1. Firing patterns of gastrocnemius motor units in the decerebrate cat
2. Muscle spindles in the lumbrical muscle of the adult cat. Electron microscopic observations and functional considerations;Corvaja N.;Arch. ital. Biol.,1969
Cited by
205 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献