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Effect of vestibular, somatic, and autonomic afferent impulsation on vestibular nuclear unit activity in cats


Single unit responses in nuclei of the vestibular complex to stimulation of the labyrinths and of proprioceptive and autonomic afferents were investigated. Different types of unit responses were obtained to stimulation, including evoked activity consisting of a group of action potentials followed by inhibition of the spike discharge. Unit activity in the vestibular nuclei was shown to depend on extralabyrinthine stimulation. In response to adequate stimulation of the labyrinths by tilting the head, the role of receptors of muscles and joints in the neck was distinguished. The question of the somatotopic organization of the vestibular nuclei and convergence of various afferent flows on neurons giving rise to the vestibulospinal tract is discussed.

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Additional information

Institute of Medico-Biological Problems, Ministry of Health of the USSR, Moscow. Translated from Neirofiziologiya, Vol. 8, No. 5, pp. 507–513, September–October, 1976.

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Aizikov, G.S., Malikova, S.N. & Radkevich, L.A. Effect of vestibular, somatic, and autonomic afferent impulsation on vestibular nuclear unit activity in cats. Neurophysiology 8, 387–392 (1976).

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  • Unit Activity
  • Single Unit
  • Vestibular Nucleus
  • Unit Response
  • Spike Discharge