Cited by 29Vestibular and auditory disordersMotor Control and AdaptationVisual perception and processing mechanisms

Encoding of Eye Position in the Goldfish Horizontal Oculomotor Neural Integrator

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Debowy, Owen, Baker, Robert·2011·Journal of Neurophysiology

Abstract

Monocular organization of the goldfish horizontal neural integrator was studied during spontaneous scanning saccadic and fixation behaviors. Analysis of neuronal firing rates revealed a population of ipsilateral (37%), conjugate (59%), and contralateral (4%) eye position neurons. When monocular optokinetic stimuli were employed to maximize disjunctive horizontal eye movements, the sampled population changed to 57, 39, and 4%. Monocular eye tracking could be elicited at different gain and phase with the integrator time constant independently modified for each eye by either centripetal (leak) or centrifugal (instability) drifting visual stimuli. Acute midline separation between the hindbrain oculomotor integrators did not affect either monocularity or time constant tuning, corroborating that left and right eye positions are independently encoded within each integrator. Together these findings suggest that the “ipsilateral” and “conjugate/contralateral” integrator neurons primarily target abducens motoneurons and internuclear neurons, respectively. The commissural pathway is proposed to select the conjugate/contralateral eye position neurons and act as a feedfoward inhibition affecting null eye position, oculomotor range, and saccade pattern.

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Crossref · 10.1152/jn.00313.2010

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63 of 63 references verified0 citation errors · 0 not checkable

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  • Together, these subnetworks could provide for maintenance of conjugate and disconjugate eye movements.

    “Together, these subnetworks could provide for maintenance of conjugate and disconjugate eye movements56–58.”
  • Previous experiments have shown that one-half of the VPNI is capable of maintaining the ipsilateral range of eye positions after the contralateral half of the VPNI is silenced.

    “Although the VPNI is a bilateral circuit, previous experiments20,56 have shown that one-half of the VPNI is nevertheless capable of maintaining the ipsilateral range of eye positions after the contralateral half of the VPNI is silenced.”
  • Those few VPNI neurons with contraversive sensitivity were deemed unlikely to be part of the VPNI based on previous work.

    “The vast majority of putatutive VPNI neurons (98%) also had ipsiversive sensitivity; those few cells with contraversive sensitivity were deemed unlikely to be part of the VPNI based on previous work49,56 and not considered further.”

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Authors
Debowy, O., & Baker, R.
Affiliations
New York University (US)
Corresponding author
Baker, Robert
Venue
Journal of Neurophysiology
Published
2011-02
Volume
105
Issue
2
Pages
896-909
ISSN
  • 0022-3077 (ISSN-L)
  • 1522-1598
OpenAlex
W2157966324
Cited by
29
References
63
Citations by year
2026: 1 · 2025: 2 · 2024: 2 · 2023: 1 · 2021: 3 · 2020: 3 · 2019: 3 · 2018: 1 · 2017: 2 · 2015: 2 · 2014: 3 · 2013: 3
FWCI
1.16
Type
journal article
Language
en
Open access
Locations
  • Journal of Neurophysiology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Neurology › Vestibular and auditory disorders
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Motor Control and Adaptation
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
Keywords
goldfish, conjugate eye movements, abducens motoneurons, commissural pathways
MeSH terms
Anatomy, Animals, Cerebral Cortex, Fixation, Ocular, Goldfish, Motor Neurons, Nerve Net, Saccades

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