Role of the dorsolateral pontine nucleus in two components of optokinetic nystagmus (OKN).

Role of the dorsolateral pontine nucleus in two components of optokinetic nystagmus (OKN). Research Abstract Details 

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Role of the dorsolateral pontine nucleus in two components of optokinetic nystagmus (OKN). Abstract Text:

I Kato,S Sato,S Watanabe,H Nakashima,I Takeyama,Y Watanabe,

The anatomical features of the dorsolateral pontine nucleus (DLPN) implicate a role of the nucleus in the generation of smooth-pursuit eye movements. The DLPN receives convergent inputs from a variety of parieto-occipital cortical visual areas and projects its fibers to the flocculus and vermal lobules VI and VII. In addition to cortical afferent fibers, the DLPN receives descending fibers from the nucleus of the optic tract which is indicated as the first subcortical optokinetic nystagmus (OKN) relay. DLPN units respond not only to a discrete visual spot but also to large-field OKN stimuli. On the basis of the above anatomical and physiological features, OKN was investigated in 2 alert monkeys whose DLPN was physiologically identified and into which reversible lidocaine was injected. The present findings showed that a rapid rise in OKN velocity was reduced in both monkeys, whose lesions included the uppermost rostral part of the nucleus in the one monkey and the entire nucleus in the other, whereas optokinetic after-nystagmus velocity was affected only in the latter. Taken together with physiological data, the DLPN possibly shares the domain of low selectivity speed selection in OKN and does not play a main role in the generation of OKN.

Role of the dorsolateral pontine nucleus in two components of optokinetic nystagmus (OKN). Publishing Authors By Initials

I Kato,S Sato,S Watanabe,H Nakashima,I Takeyama,Y Watanabe,

For similar nervous system: neural pathways: afferent pathways: visual pathways research abstracts see: nervous system: neural pathways: afferent pathways: visual pathways research

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Role of the dorsolateral pontine nucleus in two components of optokinetic nystagmus (OKN). Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Acta oto-laryngologica. Supplementum

VOLUME: 504

Page Numbers: 7-12

Journal Abbreviation:

ISSN: 0365-5237

DAY: 13

MONTH: 02

YEAR: 1993

Role of the dorsolateral pontine nucleus in two components of optokinetic nystagmus (OKN). Information

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LANGUAGE: eng

NlmUniqueID: 370355

Role of the dorsolateral pontine nucleus in two components of optokinetic nystagmus (OKN). Keywords Mesh Terms:

KEYWORDS: Visual Pathways

MESH TERMS: physiology

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Grant and Affiliation Information for Role of the dorsolateral pontine nucleus in two components of optokinetic nystagmus (OKN).

AFFILIATION: Department of Otolaryngology, St. Marianna University School of Medicine, Kanagawa, Japan.

Country: SWEDEN

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MEDLINETA: Acta Otolaryngol Suppl

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