Vestibular responses and branching of interstitiospinal neurons

Experimental Brain Research
K FukushimaM Kato

Abstract

1. Interstitiospinal neurons were activated by antidromic stimulation of the ventromedial funiculus of the spinal cord at C1 and C4 in cerebellectomized cats under chloralose anesthesia. 46% of these neurons responded only at C1 (N cells) and the remaining 54% responded at C4 also (D cells). There is no topographical difference in the location of N and D cells. Conduction velocities of N cells were significantly slower than those of D cells. 2. Stimulation of the contralateral whole vestibular nerve evoked firing of 31% of both N and D cells; some responded early enough to suggest disynaptic connections, many responded late. Stimulation of the ipsilateral whole vestibular nerve evoked firing of several cells, one spontaneously discharging D cell was inhibited. 3. Stimulation of the contralateral individual semicircular canal nerves evoked firing of 33% of N cells and 13% of D cells. Most of these responses were late. N cells responded not only to the vertical canals but also to the horizontal canal, whereas D cells responded to the horizontal canal, but seldom to the vertical ones. Most canal responding neurons received specific input, only two N cells received convergent input from both the anterior and horizontal canals. Stim...Continue Reading

References

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Citations

Nov 1, 1984·Brain Research Bulletin·R D SkinnerJ A Fitzgerald
Dec 10, 2003·Annals of the New York Academy of Sciences·Eliana M Klier, J Douglas Crawford
Feb 15, 1988·The Journal of Comparative Neurology·S J Spence, J A Saint-Cyr
Nov 3, 2006·Journal of Neurophysiology·Eliana M KlierJ Douglas Crawford
Jan 19, 2007·Journal of Neurophysiology·Farshad FarshadmaneshJ Douglas Crawford
Feb 22, 2017·Movement Disorders : Official Journal of the Movement Disorder Society·Alexey SedovAasef G Shaikh
Mar 10, 1982·The Journal of Comparative Neurology·J G Rutherford, D G Gwyn

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