OCULAR TORSION PRODUCED BY UNILATERAL CHEMICAL INACTIVATION OF THE INTERSTITIAL NUCLEUS OF CAJAL IN CHRONICALLY LABYRINTHECTOMIZED CATS

被引:23
作者
FUKUSHIMA, K
OHASHI, T
FUKUSHIMA, J
KASE, M
机构
[1] Department of Physiology, Hokkaido University School of Medicine, Sapporo
关键词
INTERSTITIAL NUCLEUS OF CAJAL; OCULAR TORSION; VERTICAL EYE MOVEMENT; MUSCIMOL INFUSION; LABYRINTHECTOMY; OCULAR TILT REACTION; NEURAL INTEGRATOR; CAT;
D O I
10.1016/0168-0102(92)90041-A
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Unilateral lesions of the rostral midbrain involving the interstitial nucleus of Cajal (INC have been known to produce ocular torsion in alert animals including humans, which has been assumed to be the result of an impaired otolith-ocular reflex. We examined the effects of chemical deactivation of the INC using a gamma-aminobutyric acid (GABA) agonist (muscimol) in cats that had received bilateral labyrinthectomy, and compared the results with those in normal cats. Ocular torsion with a magnitude similar to that observed in normal cats appeared in chronically labyrinthectomized cats after unilateral muscimol infusion into the INC, indicating that ocular torsion following unilateral INC deactivation can be produced by a mechanism independent of the otolith-ocular reflex.
引用
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页码:301 / 305
页数:5
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