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Related Experiment Videos

Saccadic adaptation in neurological disorders.

Michael R MacAskill1, Tim J Anderson, Richard D Jones

  • 1Christchurch Movement Disorders and Brain Research Group, Department of Medicine, Christchurch School of Medicine and Health Sciences, Christchurch, New Zealand. michael.macaskill@chmeds.ac.nz

Progress in Brain Research
|January 2, 2003
PubMed
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Saccadic adaptation, crucial for neurological recovery, is preserved in Parkinson's disease (PD) for visual tasks but impaired for memory-guided tasks. This suggests distinct brain regions support different adaptation types in PD.

Area of Science:

  • Neuroscience
  • Ophthalmology
  • Neurology

Background:

  • Saccadic adaptive processes are vital for recovery from neurological disorders affecting vision.
  • Previous studies have explored these processes in conditions like myasthenia gravis, palsies, and macular degeneration.
  • Research has also investigated adaptation using intrasaccadic target displacement in clinical populations.

Purpose of the Study:

  • To review the role of saccadic adaptation in neurological disorder recovery.
  • To present new data on saccadic adaptation in Parkinson's disease (PD).
  • To investigate the dissociation between visually guided and memory-guided saccadic adaptation in PD.

Main Methods:

  • Review of existing literature on saccadic adaptation in neurological disorders.

Related Experiment Videos

  • Presentation of data from a study involving 12 subjects with Parkinson's disease.
  • Stimulation of adaptation using intrasaccadic displacement of visual targets.

    • Main Results:

    • Visually guided saccadic adaptation is preserved in individuals with Parkinson's disease.
    • Memory-guided saccadic adaptation is impaired in individuals with Parkinson's disease.
    • Findings support a model where different brain regions are responsible for different types of adaptation.

    Conclusions:

    • Saccadic adaptation plays a key role in visual recovery following neurological damage.
    • Parkinson's disease exhibits a selective impairment in memory-guided saccadic adaptation.
    • Distinct neural substrates underlie visually guided versus memory-guided saccadic adaptation.