Functional properties of interneurons of the masticatory reflex

Gura, E. V.; Limanskii, Yu. P.; Pilyavskii, A. I.

doi:10.1007/bf01063415

Cited by 6 publications

(4 citation statements)

References 11 publications

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“…Further support for a projection of jaw-muscle spindle afferents to this region comes from electrophysiological studies in cats and rats (Appenteng et al, 1989;Jerge, 1963b;Miyazaki and Luschei, 1987;Takata and Kawamura, 1970;Gura et al, 1972). Unitary extracellular recordings in this region are modulated during jawmuscle stretch (Jerge, 1963;Miyazaki and Luschei, 1987) and intracellular recordings (Takata and Kawamura, 1970) appear to confirm the existence of cells in this region receiving muscle spindle input.…”

Section: Projections Dorsal To the Trigeminal Motor Nucleusmentioning

confidence: 93%

“…Systematic classification of trigeminal interneurons, based on afferent input, comparable to the Ia and Ib interneurons found in the spinal cord is still lacking. It seems likely that many trigeminal interneurons are shared by various reflex pathways (Appenteng et al, 1989(Appenteng et al, , 1990Gura et al, 1972;Kamogawa et al, 1988;Olsson et al, 1986;Sessle, 1977a) as in the spinal cord (Harrison et al, 1983;Jankowska et al, 1981).…”

Section: Sensory Partitioningmentioning

confidence: 99%

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Central Connections of Trigeminal Primary Afferent Neurons: Topographical and Functional Considerations

Capra

Dessem

1992

Critical Reviews in Oral Biology & Medicine

100

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This article reviews literature relating to the central projection of primary afferent neurons of the trigeminal nerve. After a brief description of the major nuclei associated with the trigeminal nerve, the presentation reviews several early issues related to theories of trigeminal organization including modality and somatotopic representation. Recent studies directed toward further definition of central projection patterns of single nerve branches or nerves supplying specific oral and facial tissues are considered together with data from intraaxonal and intracellular studies that define the projection patterns of single fibers. A presentation of recent immunocytochemical data related to primary afferent fibers is described. Finally, several insights that recent studies shed on early theories of trigeminal input are assessed.

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Section: Projections Dorsal To the Trigeminal Motor Nucleusmentioning

confidence: 93%

Section: Sensory Partitioningmentioning

confidence: 99%

Central Connections of Trigeminal Primary Afferent Neurons: Topographical and Functional Considerations

Capra

Dessem

1992

Critical Reviews in Oral Biology & Medicine

100

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“…Previous studies (Jerge, 1963;Appenteng et al, 1978;Miyazaki and Luschei, 1987) have reported that neurons in the Vsup can be activated by stretching of the jaw-elevator muscles, a strong stimulus for the activation of muscle spindle afferents. Additional evidence for muscle spindle afferent input to Vsup neurons is provided by reports that these interneurons are activated by palpation of the jaw muscles, stimulation of jaw-muscle nerves, and succinylcholine infusion (Takata and Kawamura, 1970;Gura et al, 1972). One factor which may contribute to the spindle-related response of these neurons is that they are significantly smaller than many other premotor neurons (Table 2) and thus may possess higher input resistance and relatively larger postsynaptic potentials.…”

Section: Premotor Neurons Receiving Jaw-muscle Spindle Afferent Inputmentioning

confidence: 94%

Jaw‐muscle spindle afferent pathways to the trigeminal motor nucleus in the rat

Luo

Moritani

Dessem

2001

J of Comparative Neurology

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Neural pathways conveying proprioceptive feedback from the jaw muscles were studied in rats by combining retrograde and intracellular neuronal labeling. Initially, horseradish peroxidase was iontophoresed unilaterally into the trigeminal motor nucleus (Vmo). Two days later, 1-5 jaw-muscle spindle afferent axons located in the mesencephalic trigeminal nucleus were physiologically identified and intracellularly stained with biotinamide. Stained mesencephalic trigeminal jaw-muscle spindle afferent axon collaterals and boutons were predominantly distributed in the supratrigeminal region (Vsup), Vmo, dorsomedial trigeminal principal sensory nucleus (Vpdm), parvicellular reticular formation (PCRt), alpha division of the parvicellular reticular formation (PCRtA), and dorsomedial portions of the spinal trigeminal subnuclei oralis (Vodm), and interpolaris (Vidm). Numerous neurons retrogradely labeled with horseradish peroxidase from the trigeminal motor nucleus were found bilaterally in the PCRt, PCRtA, Vodm, and Vidm. Retrogradely labeled neurons were also present contralaterally in the Vsup, Vpdm, Vmo, peritrigeminal zone, and bilaterally in the dorsal medullary reticular field. Putative contacts between intracellularly stained mesencephalic trigeminal jaw-muscle spindle afferent boutons and trigeminal premotor neurons retrogradely labeled with horseradish peroxidase were found in the ipsilateral Vodm, PCRtA, and PCRt, as well as the contralateral Vsup, Vmo, Vodm, PCRt, and PCRtA. Thus, multiple disynaptic jaw-muscle spindle afferent-motoneuron circuits exist. These pathways are likely to convey long-latency jaw-muscle stretch reflexes and may contribute to stiffness regulation of the masticatory muscles.

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“…Previous studies (Jerge, 1963; Appenteng et al, 1978; Miyazaki and Luschei, 1987) have reported that neurons in the Vsup can be activated by stretching of the jaw‐elevator muscles, a strong stimulus for the activation of muscle spindle afferents. Additional evidence for muscle spindle afferent input to Vsup neurons is provided by reports that these interneurons are activated by palpation of the jaw muscles, stimulation of jaw‐muscle nerves, and succinylcholine infusion (Takata and Kawamura, 1970; Gura et al, 1972). One factor which may contribute to the spindle‐related response of these neurons is that they are significantly smaller than many other premotor neurons (Table 2) and thus may possess higher input resistance and relatively larger postsynaptic potentials.…”

Section: Discussionmentioning

confidence: 99%

Analytical gradients for Singer's multicenter n‐electron explicitly correlated Gaussians

Cafiero

Adamowicz

2001

Int J of Quantum Chemistry

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ABSTRACT:Analytical gradients for Singer's basis of n-electron multicenter explicitly correlated Gaussian functions are derived and implemented to variationally optimize the energy and wave function of molecular systems within the Born-Oppenheimer approximation. Wave functions are optimized with respect to ( 1 2 n(n + 1) + 3n) nonlinear variational parameters and one linear coefficient per term in the basis set. Preliminary results for the ground states of H 3 + and H 3 suggest that the method can be more flexible and can achieve lower energies than previously reported calculations.

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Functional properties of interneurons of the masticatory reflex

Cited by 6 publications

References 11 publications

Central Connections of Trigeminal Primary Afferent Neurons: Topographical and Functional Considerations

Central Connections of Trigeminal Primary Afferent Neurons: Topographical and Functional Considerations

Jaw‐muscle spindle afferent pathways to the trigeminal motor nucleus in the rat

Analytical gradients for Singer's multicenter n‐electron explicitly correlated Gaussians

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