Difference between vertical and horizontal saccades across the human lifespan

Experimental Eye Research
Elizabeth L Irving, Linda Lillakas

Abstract

The purpose of the study was to analyze vertical saccade parameters (latency, peak velocity, amplitude gain), and compare them to those of horizontal saccades in a cross-sectional study across the ages of the human lifespan. One hundred and thirty one participants (62 males) between the ages of 3 and 86 years made vertical prosaccades of 2-44° in response to a dot stimulus projected on a screen. A subset of participants also made horizontal prosaccades of 2-60° under the same conditions. The El-Mar (Downsview, Ontario, Canada) eye tracker was used to record binocular eye movements. Measures of saccadic latency, peak velocity and amplitude gain were calculated for each participant. Differences between saccade parameters for upward & downward saccades were calculated. Vertical saccade parameters were evaluated as a function of age and age related differences between vertical and horizontal saccade parameters were determined. There was no significant difference between upward and downward saccades and no effect of age for either latency or peak velocity. Downward saccades had significantly higher gains than upward saccades (p = 0.0001) and this difference increased significantly with age (p = 0.001). Vertical saccadic latency init...Continue Reading

Citations

Jan 4, 2020·Neurological Sciences : Official Journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology·Jaromír HanuškaEvžen Růžička
Jan 15, 2021·Scientific Reports·Nouk TankeJeroen Goossens
Sep 17, 2021·PloS One·Sourav DattaPremNandhini Satgunam

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