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Titolo:
Commissural effects in the otolith system
Autore:
Uchino, Y; Sato, H; Zakir, M; Kushiro, K; Imagawa, M; Ogawa, Y; Ono, S; Meng, H; Zhang, X; Katsuta, H; Isu, N; Wilson, VJ;
Indirizzi:
Tokyo Med Univ, Dept Physiol, Shinjuku Ku, Tokyo 1608402, Japan Tokyo Med Univ Tokyo Japan 1608402 ol, Shinjuku Ku, Tokyo 1608402, Japan Tokyo Med Univ, Dept Otolaryngol, Shinjuku Ku, Tokyo 1608402, Japan Tokyo Med Univ Tokyo Japan 1608402 ol, Shinjuku Ku, Tokyo 1608402, Japan Tokyo Med Univ, Dept Orthoped Surg, Shinjuku Ku, Tokyo 1608402, Japan Tokyo Med Univ Tokyo Japan 1608402 rg, Shinjuku Ku, Tokyo 1608402, Japan Tottori Univ, Fac Engn, Dept Informat & Knowledge Engn, Tottori 6800945, Japan Tottori Univ Tottori Japan 6800945 nowledge Engn, Tottori 6800945, Japan Rockefeller Univ, New York, NY 10021 USA Rockefeller Univ New York NY USA10021 eller Univ, New York, NY 10021 USA
Titolo Testata:
EXPERIMENTAL BRAIN RESEARCH
fascicolo: 4, volume: 136, anno: 2001,
pagine: 421 - 430
SICI:
0014-4819(200102)136:4<421:CEITOS>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
SINGLE VESTIBULAR NEURONS; ACTIVATED VESTIBULOSPINAL NEURONS; SQUIRREL-MONKEY; SECONDARY NEURONS; DECEREBRATE CATS; UTRICULAR INPUTS; SACCULAR NERVE; ELECTROPHYSIOLOGICAL ANALYSIS; REFLEX ARC; NUCLEI;
Keywords:
vestibular neuron; labyrinth; utriculus; sacculus; cat;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
38
Recensione:
Indirizzi per estratti:
Indirizzo: Uchino, Y Tokyo Med Univ, Dept Physiol, Shinjuku Ku, 6-1-1 Shinjuku, Tokyo1608402, Japan Tokyo Med Univ 6-1-1 Shinjuku Tokyo Japan 1608402 608402, Japan
Citazione:
Y. Uchino et al., "Commissural effects in the otolith system", EXP BRAIN R, 136(4), 2001, pp. 421-430

Abstract

We examined whether otolith-activated second- and third-order vestibular nucleus neurons received commissural inhibition from the contralateral otolithic macula oriented in the same geometric plane. For this purpose we performed intracellular recording in vestibular nucleus neurons after stimulation of the ipsi- and contralateral utricular and saccular nerves. More than half (41/72) of the utricular-activated second-order vestibular nucleus neurons received commissural inhibition from the contralateral utricular nerve. The remaining neurons (31/72) showed no visible response to contralateral utricular nerve stimulation. About half (17/36) of utricular-activated third-order neurons also received commissural inhibition from the contralateralutricular nerve. Approximately 10% (7/67) of saccular-activated second-order vestibular neurons received polysynaptic commissural inhibition, whereas16% (11/67) received commissural facilitation. The majority (49/67) of saccular second-order vestibular neurons, and almost all (22/23) third-order neurons, showed no visible response to stimulation of the contralateral saccular nerve. The present findings suggest that many utricular-activated vestibular nucleus neurons receive commissural inhibition, which may provide a mechanism for increasing the sensitivity of vestibular neurons to horizontal linear acceleration and lateral tilt of the head, Commissural inhibition in the saccular system was less prominent than in the utricular system.

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Documento generato il 28/09/20 alle ore 15:37:29