The effect of ageing on catch-up saccades during horizontal smooth pursuit eye movement

Chan, Tak Chun; Codd, Mary; Kenny, Patrick; Eustace, P.

doi:10.3109/01658109009009631

Cited by 6 publications

(5 citation statements)

References 7 publications

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“…The incidence of catch-up saccades is known to increase with aging [18,21] and our findings are in accordance with those previous studies. Moreover, the presence of surface perturbations increased the number of catch-up saccades in both of our groups.…”

Section: Perturbing Upright Stance Affects Gaze Control In Older Adultssupporting

confidence: 95%

Old age affects gaze and postural coordination

Paquette

Fung

2011

Gait & Posture

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Section: Perturbing Upright Stance Affects Gaze Control In Older Adultssupporting

confidence: 95%

Old age affects gaze and postural coordination

Paquette

Fung

2011

Gait & Posture

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“…On the contrary, our method furnishes a global evaluation by means of a ratio between position signals, or in other words, a ratio between the integral of eye and target velocity tracings over the entire ramp, after the elimination of catch-up saccades. It is evident that a relationship must exist between these two methods of evaluating smooth pursuit performance, and this relationship has been previously studied by several authors (10)(11)(12)(13). the VjPI relationship is a tool using only two coefficients (a and b) to synthetize several data points corresponding to pursuit index values for a wide range of target velocities.…”

Section: Discussionmentioning

confidence: 99%

A clinically oriented approach to smooth pursuit eye movement quantitative evaluation

Versino

Beltrami

Zambarbieri

et al. 2009

Acta Neurologica Scandinavica

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The electrooculographic technique was used to record smooth pursuit eye movements in 71 healthy subjects homogeneously distributed within an age range between the 2nd and the 6th decades. The target moved at constant velocity (triangular ramps) and 9 different target velocities (V), from 10 deg/s to 50 deg/s were considered and presented according to pseudorandom sequence. Ad hoc software suppressed catch‐up saccades so that a pursuit index (PI) value was computed for each ramp taking into account only the smooth pursuit tracking modality. It was demonstrated that the relationship between V and PI could be described by the linear model PI =a + b* V. Pursuit index was proved to be influenced by the age of subject (decade factor in the analysis of variance), since an almost linear increase in b values yields a reduction of pursuit index values. The method was tested in 22 multiple sclerosis patients and an association was found between the occurrence of cerebellar signs and the reduction of a value.

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“…Age results in a decline in several aspects of smooth pursuit performance (12,75–80), possibly as a result of atrophy of cerebral cortical neurons or loss of cerebellar Purkinje cells. As people age, they react less quickly to the initial stimulus movement (78), show reduced gain, and require more catch‐up saccades to track adequately (12,76–78,80). As one researcher stated, “the diagnosis of abnormal pursuit must be qualified by the age of the patient.…”

mentioning

confidence: 99%

“…While younger subjects are able to maintain gains of over 0.90 to targets moving 30–40°/sec, the gain for elderly subjects fell below 0.90 when targets exceeded 5°/sec in one study (80). A significant decline in maximum gain may occur as early as after age 30 ([76]; see Fig. 2).…”

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confidence: 99%

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Horizontal Gaze Nystagmus: A Review of Vision Science and Application Issues

Rubenzer¹,

Stevenson

2010

Journal of Forensic Sciences

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The Horizontal Gaze Nystagmus (HGN) test is one component of the Standardized Field Sobriety Test battery. This article reviews the literature on smooth pursuit eye movement and gaze nystagmus with a focus on normative responses, the influence of alcohol on these behaviors, and stimulus conditions similar to those used in the HGN sobriety test. Factors such as age, stimulus and background conditions, medical conditions, prescription medications, and psychiatric disorder were found to affect the smooth pursuit phase of HGN. Much less literature is available for gaze nystagmus, but onset of nystagmus may occur in some sober subjects at 45 degrees or less. We conclude that HGN is limited by large variability in the underlying normative behavior, from methods and testing environments that are often poorly controlled, and from a lack of rigorous validation in laboratory settings.

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The effect of ageing on catch-up saccades during horizontal smooth pursuit eye movement

Cited by 6 publications

References 7 publications

Old age affects gaze and postural coordination

Old age affects gaze and postural coordination

A clinically oriented approach to smooth pursuit eye movement quantitative evaluation

Horizontal Gaze Nystagmus: A Review of Vision Science and Application Issues

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