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Related Experiment Videos

Lambda waves associated with offset of saccades: a subject with large lambda waves.

A Yagi

    Biological Psychology
    |May 1, 1979
    PubMed
    Summary
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    The lambda wave, an eye movement response, is linked to the saccade

    Area of Science:

    • Ophthalmology and neuroscience
    • Visual electrophysiology

    Background:

    • The lambda wave is an electrophysiological response observed during eye movements.
    • Its precise temporal relationship with saccades, particularly their onset or offset, remains unclear.

    Purpose of the Study:

    • To investigate the temporal relationship between lambda waves and saccades.
    • To determine if lambda waves are associated with saccade onset or offset.

    Main Methods:

    • Recording electroencephalography (EEG) signals during saccadic eye movements.
    • Analyzing the latency of lambda waves relative to both the onset and offset of saccades.
    • Utilizing a subject with large amplitude lambda waves for detailed analysis.

    Main Results:

    Related Experiment Videos

    • Lambda wave peak latency from saccade onset increased with saccade duration.
    • Lambda wave peak latency from saccade offset remained constant regardless of saccade duration.
    • This suggests a stronger association between lambda waves and saccade offset.

    Conclusions:

    • The lambda wave is more closely associated with the offset of a saccade than its onset.
    • It is hypothesized that the lambda wave may represent an evoked response to afferent visual inflow initiating fixation after a saccade.