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- W2089225739 abstract "The aim of this study was to determine whether the transmission from sensory inputs to reticulospinal neurons is modulated during fictive locomotion in lampreys. Reticulospinal neurons play a key role in the control of locomotion; modulation of sensory transmission to these neurons might be of importance for the adaptation of the control they exert during locomotion. In this series of experiments, intracellular synaptic responses of reticulospinal neurons of the posterior rhombencephalic reticular nucleus elicited by electrical stimulation of vestibular nerves on each side were studied during fictive locomotion induced by 50 microM N-methyl-D-aspartate (NMDA). Interestingly, shortly after NMDA had reached the bath and much before locomotor discharges were apparent in the recorded ventral roots, there was a significant depression of the synaptic transmission from vestibular nerves. The effect was reversed by washing out the NMDA and persisted in the isolated brainstem after spinal transection at the first segmental level. As locomotor discharges appeared in the ventral roots, synaptic responses elicited by vestibular nerve stimulation showed a clear phasic modulation of their amplitude during the locomotor cycle. Responses to stimulation of the ipsilateral vestibular nerve were smaller during the ipsilateral burst discharge than during the contralateral activity, whilst responses to stimulation of the contralateral vestibular nerve were minimal during contralateral activity and maximal during ipsilateral activity. This opposite pattern of modulation observed in the same reticulospinal neuron suggests that the phasic modulation of vestibular transmission is not due to changes in the membrane properties of the reticulospinal cell but is produced at a pre-reticular level.(ABSTRACT TRUNCATED AT 250 WORDS)" @default.
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- W2089225739 date "1992-06-01" @default.
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- W2089225739 title "Phasic modulation of transmission from vestibular inputs to reticulospinal neurons during fictive locomotion in lampreys" @default.
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- W2089225739 doi "https://doi.org/10.1016/0006-8993(92)90330-c" @default.
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