The characteristics and neuronal substrate of saccadic eye movement plasticity

@article{Hopp2004TheCA,
  title={The characteristics and neuronal substrate of saccadic eye movement plasticity},
  author={J. Johanna Hopp and Albert F. Fuchs},
  journal={Progress in Neurobiology},
  year={2004},
  volume={72},
  pages={27-53}
}
  • J. Hopp, A. Fuchs
  • Published 31 January 2004
  • Psychology, Biology
  • Progress in Neurobiology

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References

SHOWING 1-10 OF 168 REFERENCES
Investigating the site of human saccadic adaptation with express and targeting saccades
TLDR
It is concluded that saccadic adaptation transfers robustly between targeting and express saccades and that adaptation in humans occurs after the pathways generating these two types of saccade converge, probably at or downstream from the superior colliculus.
Rapid adaptation of saccadic amplitude in humans and monkeys.
TLDR
Induced saccadic dysmetria provides a tool for the study of adaptive motor learning in the oculomotor system and it is hypothesized that the adaptive mechanism may use either or both of two signals: a visual error signal representing the retinal distance of the target from the fovea after the initial saccades and/or a motor error signal represented by the amplitude of the corrective saccade.
Effect of short-term saccadic adaptation on saccades evoked by electrical stimulation in the primate superior colliculus.
TLDR
Stimulating at 44 low-threshold sites in the superior colliculi of three monkeys revealed that using low current levels evoked saccades that were modified by adaptation, but that the mechanism mediating saccade adaptation is sensitive to the parameters of electrical stimulation.
Saccadic gain modification: visual error drives motor adaptation.
TLDR
It is concluded that saccadic gain adaptation involves an error signal that is primarily visual, not motor, but that the adaptation itself is primarily motor, not visual.
Adaptive modification of saccade size produces correlated changes in the discharges of fastigial nucleus neurons.
TLDR
These changes are argued to be appropriate for causing the associated changes in saccade size based on current knowledge of the anatomical connections of fastigial neurons, as well as on the effects of cerebellar lesions and on recordings in other structures.
Saccadic plasticity: parametric adaptive control by retinal feedback.
TLDR
Each element of a sensory-motor structure underlying saccadic plasticity is associated with a particular retinal or spatial sensory locus and can alter its motor response without much affecting the response of neighboring elements, consistent with the finding that distributed training slows adaptation.
Visually induced adaptive changes in primate saccadic oculomotor control signals.
TLDR
This study attempts to characterize the adaptive mechanism for suppression of postsaccadic drift and shows that the time constant of the ocular drift is influenced by the time Constant of the adapting stimulus, which cannot be explained by the simple pulse-step model of saccadic innervation.
Monkey Superior Colliculus Activity During Short-Term Saccadic Adaptation
Transfer of short-term adaptation in human saccadic eye movements
TLDR
It is concluded that short-term adaptation is expressed at a multisensory stage, where saccadic eye movements are represented as desired eye displacement vectors (motor error).
Illusory shifts in visual direction accompany adaptation of saccadic eye movements
TLDR
It is shown, by means of a perceptual illusion, that traditional cancellation theories cannot explain stability in the visual world and that the perceptual system did not takethe adaptive changes into account.
...
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4
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