Motor Trigeminal Nucleus
Mostrando 1-12 de 18 artigos, teses e dissertações.
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1. Connections and neurochemical characterization of neural pathways involved in the control of jaw movements / Conexões e caracterização neuroquímica de vias neurais envolvidas com o controle dos movimentos mandibulares
O núcleo motor do trigêmeo (Mo5) está cercado por um anel de neurônios pré-motores localizados na região h. Estudos demonstram que neurônios que inervam o Mo5 estão distribuídos no tronco encefálico e no prosencéfalo. Após implante de traçador retrógrado no Mo5, verificamos células retrogradamente marcadas no núcleo mesencefálico do trigême
Publicado em: 2007
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2. Bilateral innervation of the anterior digastric muscle by trigeminal motor neurons.
The locations and numbers of trigeminal motor neurons supplying the anterior digastric muscle in the rat were observed following retrograde transport of horseradish peroxidase. Unilateral injection of horseradish peroxidase into the muscle resulted in bilateral labelling of cells in the ventromedial region of the caudal trigeminal nucleus. The numbers of cel
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3. The origin of the preganglionic parasympathetic fibres to the mandibular and sublingual salivary glands in the rat: a horseradish peroxidase study.
Horseradish peroxidase was applied to a ligation of the chorda tympani nerves running alongside the submandibular duct in order to label the preganglionic parasympathetic salivatory neurons in the brain stem. Labelled neurons were found in the ipsilateral motor trigeminal nucleus, lateral reticular formation and in the facial motor nuclei of both sides. Howe
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4. On the bilateral innervation of masticatory muscles: a study with retrograde tracers.
Using horseradish peroxidase and fluorescent compounds as retrograde tracers, the myotopical arrangement and axon trajectories of the motoneurons innervating the supramandibular and the suprahyoidal muscles were studied in the rat. Only motoneurons ipsilateral to the injection site were labelled. In the trigeminal motor nucleus, motoneurons of the superficia
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5. The monosynaptic excitatory connections of single trigeminal interneurones to the V motor nucleus of the rat.
1. We have used the extracellular spike-triggered averaging method to identify a population of trigeminal interneurones that make monosynaptic connections within the V motor nucleus. The experiments were performed on rats anaesthetized with pentobarbitone (60 mg/kg I.V.; supplementary doses given as necessary to maintain a deep level of anaesthesia). 2. A tu
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6. Central projections of the nodose ganglion and the origin of vagal efferents in the lamb.
Injections of WGA-HRP and CTB-HRP were made into the cervical vagus or the nodose ganglion in a series of lambs, in order to define the sensory projections and motor origins of the vagus nerve. Injections into the nodose ganglion were much more successful than injections into the cervical vagus in effecting the desired result. The former produced labelling o
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7. Morphological and electrophysiological determination of the projections of jaw-elevator muscle spindle afferents in rats.
The fluorescent compound Lucifer Yellow was injected into the somata of nine identified jaw-elevator muscle spindle afferents, located in the V mesencephalic nucleus. Reconstructions of the central course of their axons were subsequently made from serial, transverse, sections to identify sites of projection. Three sites of termination were identified on the
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8. Effects of acrylamide and botulinum toxin on horseradish peroxidase labelling of trigeminal motor neurons in the rat.
The extent of neuronal labelling with horseradish peroxidase (HRP) was examined in rat trigeminal motor neurons at various stages of acrylamide intoxication, following HRP uptake by motor nerve endings in the anterior digastric muscle. After 7 days of acrylamide (5 daily injections of 30 mg acrylamide/kg body weight), the pattern of HRP labelling was altered
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9. Brainstem connections of vagal afferent nerves in the ferret: an autoradiographic study.
Using an autoradiographic technique the central connections of vagal afferent fibres in the ferret were studied. The results show that the principal site of termination is the ipsilateral nucleus of the tractus solitarius with smaller projections to the contralateral tractus nucleus, the dorsal motor nucleus of the vagus and the area postrema and subpostrema
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10. Convergence of trigeminal afferents on retractor bulbi motoneurones in the anaesthetized cat.
Retractor bulbi motoneurones were identified by intracellular recording of their antidromic invasion following stimulation of the motor axons. Characteristics of excitatory post-synaptic potentials (e.p.s.p.s) evoked by electrical stimulation of long ciliary nerves (corneal afferents), the supraorbital nerve and the ipsilateral or contralateral vibrissae wer
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11. Targeted deletion of the mouse POU domain gene Brn-3a causes selective loss of neurons in the brainstem and trigeminal ganglion, uncoordinated limb movement, and impaired suckling.
The Brn-3 subfamily of POU domain genes are expressed in sensory neurons and in select brainstem nuclei. Earlier work has shown that targeted deletion of the Brn-3b and Brn-3c genes produce, respectively, defects in the retina and in the inner ear. We show herein that targeted deletion of the Brn-3a gene results in defective suckling and in uncoordinated lim
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12. Multisensory Integration in Mesencephalic Trigeminal Neurons in Xenopus Tadpoles
Mesencephalic trigeminal (M-V) neurons are primary somatosensory neurons with somata located within the CNS, instead of in peripheral sensory ganglia. In amphibians, these unipolar cells are found within the optic tectum and have a single axon that runs along the mandibular branch of the trigeminal nerve. The axon has collaterals in the brain stem and is bel
American Physiological Society.