Vestibulospinal Relations: Vestibular Influences on Gamma Motoneurons and Primary Afferents
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2016, NeuroscienceCitation Excerpt :A number of factors could be responsible for disappearance of PLRs on the damaged side after LHS: (i) a decrease in excitability of spinal neurons after elimination of unilateral supraspinal drive; (ii) a decrease in efficacy of sensory input from limb mechanoreceptors due to distortions in processing of this input; (iii) a decrease in the value of sensory input from the limb. The latter factor was due to a dramatic reduction in the forces developed by extensor muscles on the damaged side (Fig. 2B, D) and monitored by load receptors, as well as due to inactivation of gamma-motoneurons [which receive significant supraspinal influences (Pompeiano, 1972; Granit, 1979; Hulliger, 1984)], leading to a decrease in signals from muscle spindles. The present study has demonstrated that a change in proportion of F-, E- and non-modulated neurons, a decrease in their activity, a change in processing of sensory information from limbs are among those factors.
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2014, NeuroscienceCitation Excerpt :The vestibular nuclei (VN) constitute a sensorimotor complex involved in the control of posture (Pompeiano, 1972; Sarkisian, 2000), eye movements (Pompeiano, 1972; Ito, 1991; Sarkisian, 2000) and motor learning (Broussard and Kassardjian, 2004).
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2009, Neuroscience LettersNoradrenaline modulates neuronal responses to GABA in vestibular nuclei
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