Inhibitory commissural connections of neurones in the trigeminal motor nucleus of the rat
| Autor: | P.J.W. Jüch, R.F. Minkels, J.D. van Willigen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 1993 |
| Předmět: |
Male
INTERNEURONS MASTICATORY MUSCLES Interneuron Inhibitory postsynaptic potential Trigeminal Nuclei stomatognathic system Postsynaptic potential Neck Muscles medicine Animals COMMISSURAL CONNECTIONS Neurons Afferent Rats Wistar General Dentistry JAW MOVEMENTS Medulla Chemistry Electromyography Masseter Muscle Body movement Cell Biology General Medicine Anatomy Electric Stimulation Rats stomatognathic diseases medicine.anatomical_structure Trigeminal motor nucleus Otorhinolaryngology PROJECTIONS Excitatory postsynaptic potential Reflex Mastication RAT TRIGEMINAL MOTOR NUCLEUS |
| Zdroj: | Archives of Oral Biology, 38(12), 1083-1091. PERGAMON-ELSEVIER SCIENCE LTD |
| ISSN: | 0003-9969 |
| Popis: | Physiological evidence is presented for the existence of commissural fibres that cross the midsagittal plane in the medulla of the rat at the level of the trigeminal motor nucleus (Mo5). These fibres, which have their origin in the Mo5, terminated in the contralateral Mo5. Small inhibitory postsynaptic potentials were recorded in jaw-closing motoneurones by electrical activation of the commissural fibres; jaw-opening and fusimotorneurones as well as the jaw-closing and jaw-opening reflex were not affected. Electromyographic recordings from jaw-closing and jaw-opening muscles in the unrestrained rat showed that masseter activity was inhibited by the commissural fibres. These trigeminal commissural connections might play a part in the co-ordination of bilateral activity of the jaw-closing musculature during unilateral chewing. |
| Databáze: | OpenAIRE |
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