Further properties of the human saccadic system: Eye movements and correction saccades with and without visual fixation points

Becker, Wolfgang; Fuchs, Albert F.

doi:10.1016/0042-6989(69)90112-6

Cited by 462 publications

(217 citation statements)

References 12 publications

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“…Normal controls tended to undershoot the memorized location, which has been previously reported in healthy participants (Becker and Fuchs 1969;Henson 1979;Leigh and Kennard 2004). Children with ADHD and their non-affected siblings showed this tendency to a lesser degree which resulted in an overshoot of the memorized target in affected children.…”

Section: Oculomotor Controlmentioning

confidence: 74%

“…Saccades towards the non-visual (memorized) target are less accurate, more variable at the endpoint, undershooting the actual location, and slower than saccades towards vi-sual targets (Becker and Fuchs 1969;Henson 1979;Gnadt et al 1991;White et al 1994). These basic measures have not been thoroughly investigated in ADHD patients, although oculomotor measures such as under-versus overshoot, velocity and duration of saccades, can provide additional information concerning the neurological substrate of saccades.…”

Section: Introductionmentioning

confidence: 99%

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Deficits in visuo-spatial working memory, inhibition and oculomotor control in boys with ADHD and their non-affected brothers

et al. 2008

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Summary. Few studies have assessed visuo-spatial working memory and inhibition in attention-deficit=hyperactivity disorder (ADHD) by recording saccades and consequently little additional knowledge has been gathered on oculomotor functioning in ADHD. Moreover, this is the first study to report the performance of non-affected siblings of children with ADHD, which may shed light on the familiality of deficits. A total of 14 boys with ADHD, 18 non-affected brothers, and 15 control boys aged 7-14 years, were administered a memory-guided saccade task with delays of three and seven seconds. Familial deficits were found in accuracy of visuospatial working memory, percentage of anticipatory saccades, and tendency to overshoot saccades relative to controls. These findings suggest memory-guided saccade deficits may relate to a familial predisposition for ADHD.

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Section: Oculomotor Controlmentioning

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Deficits in visuo-spatial working memory, inhibition and oculomotor control in boys with ADHD and their non-affected brothers

et al. 2008

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“…Moreover, pauses that are clearly shorter than the saccadic reaction time are regularly observed between primary saccades and corrective secondary saccades, especially if the corrected error is large (Becker, 1972;Becker, 1976). Finally, by-results of an earlier investigation involving small changes of target position either at the beginning or at the end of a large saccade (Becker and Fuchs, 1969) showed that a target step at the begin-* With the support of Deutsche Forschungsgemeinschaft SFB70.…”

Section: Introduciionmentioning

confidence: 99%

An analysis of the saccadic system by means of double step stimuli

1979

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Abatrac-The characteristics of saccadic reactions to double steps of a target were analysed as a function of the time lapse between the second target step and the onset of the response. The analysis suggests that goal-directed saccades are prepared in two steps; first a decision as to their direction is taken which requires a randomly varying time, and subsequently their amplitude is calculated as a time average of the fixation error. In addition. the analysis demonstrates that the preparatory processes of two different saccades may overlap in time ("parallel programming") and that. although reacting in a discontinuous manner, the saccadic system continuously processes the afferent visual information. A conceptual model based on an internal predictive feedback pathway and on a non-linear decision mechanism is proposed that accounts for the observed behaviour.

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“…The ability of observers to execute saccades in the dark to previously visible targets has been demonstrated by Becker and Fuchs (1969) and Becker and Klein (1973). Becker and Fuchs report the occurrence of horizontal saccades when a target, 40' away from fixation.…”

mentioning

confidence: 99%

The accuracy of two-dimensional saccades in the absence of continuing retinal stimulation

1977

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Further properties of the human saccadic system: Eye movements and correction saccades with and without visual fixation points

Cited by 462 publications

References 12 publications

Deficits in visuo-spatial working memory, inhibition and oculomotor control in boys with ADHD and their non-affected brothers

Deficits in visuo-spatial working memory, inhibition and oculomotor control in boys with ADHD and their non-affected brothers

An analysis of the saccadic system by means of double step stimuli

The accuracy of two-dimensional saccades in the absence of continuing retinal stimulation

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