Filters








511 Hits in 6.4 sec

A cortical substrate for the long-term memory of saccadic eye movements calibration

Denis Pélisson, Ouazna Habchi, Muriel T.N. Panouillères, Charles Hernoux, Alessandro Farnè
2018 NeuroImage  
These results demonstrate for the first time that the cerebral cortex is causally involved in maintaining saccadic adaptation over the long-term, independently from the acquisition of such oculomotor memories  ...  These results demonstrate for the first time that the cerebral cortex is causally involved in maintaining long-term oculomotor memories.  ...  The discovery of the potential role played by rTPJ in the long-term memory of saccadic eye movements calibration was then specifically addressed by two additional control experiments.  ... 
doi:10.1016/j.neuroimage.2018.06.051 pmid:29933041 fatcat:ay2stv4skzejjndzeqlvucfyha

From brainstem to cortex: Computational models of saccade generation circuitry

B. Girard, A. Berthoz
2005 Progress in Neurobiology  
The brain circuitry of saccadic eye movements, from brainstem to cortex, has been extensively studied during the last 30 years.  ...  We present the various topics these models are concerned with: location of the feedback loop, multimodal saccades, long-term adaptation, on the fly trajectory correction, strategy and metrics selection  ...  Acknowledgments This review was supported by the Bayesian Inspired Brain and BIBA Artifacts (BIBA) project, funded by the European Community (grant IST-2001-32115). The authors thank A. Grantyn, A.  ... 
doi:10.1016/j.pneurobio.2005.11.001 pmid:16343730 fatcat:5d4zsqqcifgrnat4lgs64h4a6q

Vestibular integration in human cerebral cortex contributes to spatial remapping

J. Ventre-Dominey, B. Vallee
2007 Neuropsychologia  
Our main findings was a significant hypometria in the final eye position of both VEST and UPD saccades induced during rotation to the left (contralesional) hemispace as compared to saccades induced after  ...  While the parietal cortex has long been considered a principal candidate for performing spatial transformations, the exact underlying mechanisms are still unclear.  ...  Acknowledgements The authors wish to thank Laurent Garin for providing the clinical material and Dr. Peter Dominey for his helpful comments on the manuscript.  ... 
doi:10.1016/j.neuropsychologia.2006.06.031 pmid:16959278 fatcat:64vj2y2m4vhifejup6vtjose2e

Involuntary cueing effects during smooth pursuit: facilitation and inhibition of return in oculocentric coordinates

David Souto, Dirk Kerzel
2008 Experimental Brain Research  
In the pursuit conditions, cue and target were presented during the ongoing eye movement and observers made a saccade to the target.  ...  Previously, the retinal coordinates of the cued location were changed by saccadic or smooth pursuit eye movements during the cue-target interval.  ...  S. were supported by grant PDFM1-114417 of the Swiss National Science Foundation.  ... 
doi:10.1007/s00221-008-1555-x pmid:18777172 fatcat:q63covy6n5bxnfhy2gryukbwoy

Eye movements in amyotrophic lateral sclerosis and its mimics: a review with illustrative cases

C. Donaghy, M. J. Thurtell, E. P. Pioro, J. M. Gibson, R. J. Leigh
2010 Journal of Neurology, Neurosurgery and Psychiatry  
SACCADE ABNORMALITIES IN ALS A saccade is a rapid eye movement that brings the image of an object of interest onto the fovea, for clearest vision.  ...  Figure 1 ( 1 A) Probable location of cortical areas important for eye movements in human brain. See text for discussion. Adapted from Leigh and Zee.  ... 
doi:10.1136/jnnp.2010.212407 pmid:21097546 fatcat:5gtkoinxh5f4bj7nxaxyl2bjfe

Long-term effects of cannabis on oculomotor function in humans

L Huestegge, R Radach, HJ Kunert
2008 Journal of Psychopharmacology  
The results point to substantial and specific long-term deficits in basic temporal processing of saccades and impaired visuo-spatial working memory.  ...  In the present study, the performance of 20 healthy long-term cannabis users without acute THC intoxication and 20 control subjects were examined in four basic visuomotor paradigms to search for specific  ...  The corresponding saccadic eye movements are controlled by an extensive neural network, including the basal ganglia, the brainstem, the cerebellum and the parietal and frontal cortices.  ... 
doi:10.1177/0269881108091601 pmid:18562415 fatcat:j33tjlgtvbamppb7iizgvqpkbi

Oculomotor Effects of delta-9-Tetrahydrocannabinol in Humans: Implications for the Functional Neuroanatomy of the Brain Cannabinoid System

C. J. Ploner
2002 Cerebral Cortex  
Saccadic eye movements may provide an objective measure of motor and cognitive effects of cannabinoids.  ...  The pattern of effects suggests modulation of neuronal activity in substantia nigra pars reticulata and/or dorsolateral prefrontal cortex and sparing of the eye fields and the final motor pathway for saccades  ...  It is therefore possible to infer from changes in saccade parameters, derived from a single and relatively short eye movement recording session, the functional status of the diverse neuronal substrates  ... 
doi:10.1093/cercor/12.10.1016 pmid:12217964 fatcat:m2iw7ufyu5ezvanvkodn2jawzi

Parietal stimulation destabilizes spatial updating across saccadic eye movements

A. P. Morris, C. D. Chambers, J. B. Mattingley
2007 Proceedings of the National Academy of Sciences of the United States of America  
Saccadic eye movements cause sudden and global shifts in the retinal image. Rather than causing confusion, however, eye movements expand our sense of space and detail.  ...  These experiments suggest that stimulation of IPSp distorts an eye position or displacement signal that updates the representation of space at the completion of a saccade.  ...  We thank Marc Sommer, Yves Rossetti, and Marc Kamke for comments on the manuscript and Jacqueline Snow, Charles Liu, Ian Gould, and Geoff Stuart for helpful discussions.  ... 
doi:10.1073/pnas.0610508104 pmid:17496146 pmcid:PMC1885629 fatcat:z55ahnhhxrcphkdfsteqic3l4y

Ganzfeld Stimulation or Sleep Enhance Long Term Motor Memory Consolidation Compared to Normal Viewing in Saccadic Adaptation Paradigm

Caroline Voges, Christoph Helmchen, Wolfgang Heide, Andreas Sprenger, Zoi Kapoula
2015 PLoS ONE  
This indicates the role of a stable visual array for resetting adapted saccade amplitudes.  ...  This could imply independent mechanisms that underlie the short-term ability of retrieving learned saccadic gain and its long term consolidation.  ...  Acknowledgments We would like to thank Silke Talamo for support in sleep recordings. Author Contributions Conceived and designed the experiments: CH AS. Performed the experiments: CV AS.  ... 
doi:10.1371/journal.pone.0123831 pmid:25867186 pmcid:PMC4395077 fatcat:ejhy6vbm5vdxlggiarr6cq2snq

Accurate bidirectional saccade control by a single hemicortex

T. M. Herter
2004 Brain  
The FT was then moved towards and beyond the former location of the ST which evoked tracking eye movements that moved the eyes towards and then beyond the ST, thereby moving the goal, ST, into the blind  ...  When the FT was extinguished, the patients generated, in the dark, ipsiversive saccades that moved their eyes to the remembered location of the ST with the same accuracy as normal control subjects.  ...  T.M.H. was the recipient of a CIHR studentship.  ... 
doi:10.1093/brain/awh158 pmid:15130952 fatcat:vkuy7za6pndaznypuwfu76s6q4

Assessment Of Anti-saccades Within 24 To 48 Hours Post-concussion

Nathan R. D'Amico, Megan E. Mormile, Klarie M. Ake, Katelyn E. Grimes, Dougals W. Powell, Rebecca J. Reed-Jones, Anthony P. Salvatore, Nicholas G. Murray
2016 Medicine & Science in Sports & Exercise  
The great number and duration of anti-saccades could suggest a major deficiency in oculomotor control and could be a candidate marker for concussion.  ...  METHODS: 10 PC (4 female, 6 male; age: 18.9 ± 0.9 years) and 10 MC (4 female, 6 male; age: 18.3 ± 0.6 years) wore a monocular eye tracker (240Hz) while performing 2 trials of the 60-second WiiFit Soccer  ...  [40] [41] [42] There is also a direct correlation between visual impairments and neuropsychological deficits, 43 short-term and long-term cognitive impairments, 44 and self-reported quality of life  ... 
doi:10.1249/01.mss.0000486594.83159.86 fatcat:akjvuqtl4ncuvapny47od7tpvq

Eye Movement Research in the Twenty-First Century—a Window to the Brain, Mind, and More

Aasef G. Shaikh, David S. Zee
2017 Cerebellum  
Moreover, in contemporary neuroscience, eye movements play a key role in understanding cognition, behavior, and disorders of the mind.  ...  We also emphasize the need to develop standardized test batteries for eye movements of all types including the vestibulo-ocular responses.  ...  This capability functions both as part of immediate, on-line control of each individual movement and long-term adaptive control as part of motor learning and calibration.  ... 
doi:10.1007/s12311-017-0910-5 pmid:29260439 fatcat:b6ihgs44ofcyvnkgzhwupdfsi4

Erratum: Functional anatomy of saccadic adaptation in humans

M. Desmurget, D. Pélisson, C. Urquizar, C. Prablanc, G.E. Alexander, S.T. Grafton
1998 Nature Neuroscience  
We also thank Mike Crutcher, Gyöngyi Gaál, Laura Payne and Robert Turner for discussion and critical reading of the manuscript. This project was supported by the US Public Health Service.  ...  Acknowledgements We thank Michael White and Delicia Votaw for technical assistance, and Roger Woods and John Votaw for providing image analysis software.  ...  Although this random design could produce trialby-trial changes in saccadic gain, it precluded the long-term systematic changes characteristic of saccadic adaptation.  ... 
doi:10.1038/2241 pmid:10196552 fatcat:753c6kendje3xbqpgflybc45li

Oculomotor Impairments in Developmental Dyspraxia

B. Gaymard, M. Giannitelli, G. Challes, S. Rivaud-Péchoux, O. Bonnot, D. Cohen, J. Xavier
2016 Cerebellum  
Although the neural bases of this condition are not fully understood, they are thought to involve frontal cortical areas, subcortical structures and the cerebellum.  ...  However, the clear predominance of this pattern in non-visuallyguided saccades warrants alternative hypotheses.  ...  The main role of these structures is to maintain a high level of saccade accuracy on a trial-to-trial basis and in the long term [6] .  ... 
doi:10.1007/s12311-016-0817-6 pmid:27480770 fatcat:npohjrf5jjeofl5vee2g7xerxa

A Cortico-Subcortical Model for Generation of Spatially Accurate Sequential Saccades

Peter F. Dominey, Michael A. Arbib
1992 Cerebral Cortex  
This article provides a systems framework for the analysis of cortical and subeortical interactions in the control of saccadic eye movements, A major thesis of this model is that a topography of saccade  ...  The control of voluntary saccades to visual and remembered targets is modeled in terms of interactions between posterior parietal cortex, frontal eye fields, the basal ganglia (caudate and substantia nigra  ...  The Model and Its Biological Substrate In this section, we introduce our model for the saccadic eye movement system, integrating the details of the model with their biological justification.  ... 
doi:10.1093/cercor/2.2.153 pmid:1633413 fatcat:e7rbolrkfffq3n6wrmllag367e
« Previous Showing results 1 — 15 out of 511 results