Video &amp;amp; EOG based investigation of pure saccades in human subjects

Chaudhuri, Aritra; Dasgupta, Anirban; Routray, Aurobinda

doi:10.1109/ihci.2012.6481872

Cited by 12 publications

(6 citation statements)

References 21 publications

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“…The second season's baseline latency EOG measures were longer than the first season's baseline latency measures recorded using high-speed video. Both forms of saccade measurement have been validated against gold standards for eye tracking systems 36,73 and with each other, 40,42 reinforcing that this saccade latency increase represents a measurable difference and not an experimental error. Finally, we acknowledge that specialized equipment, including head impact sensors and a saccade measurement system, are required to perform this study.…”

Section: Discussionmentioning

confidence: 92%

“…36 In the second season, electro-oculography (EOG) was used to capture participants' saccade latency and direction. [38][39][40][41] Participants were fitted with three disposable surface electrodes (AM-N00S/E, AMBU Blue Sensor Adhesive Snap Electrode; Ambu Inc, Glen Burnie, MD) placed at the outer canthi of each eye and the center of the forehead. The voltages from the electrodes were amplified using an isolated electrophysiological amplifier (Model 2024F, Intronix Technologies Corporation, Bolton, ON, Canada; bandwidth DC to 10 kHz) and sampled at 1000 Hz with a 16-bit analog-to-digital converter (USB 6211; National Instruments) using a custom LabVIEW program.…”

Section: Saccade Apparatus and Proceduresmentioning

confidence: 99%

“…Although different saccade measurement approaches were used in the two seasons, they yield comparable saccade measurements. 40,42 Video Data Analysis Video data from the high-speed camera was displayed using QuickTime Player (version 7; Apple Inc., Cupertino, CA). Eye motion onset was identified by the initial horizontal displacement in the pupil after the stimulus light.…”

Section: Saccade Apparatus and Proceduresmentioning

confidence: 99%

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Effect of Repetitive Head Impacts on Saccade Performance in Canadian University Football Players

Brooks,

Dickey

2024

Clinical Journal of Sport Medicine

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Objective: Investigate the effect of cumulative head impacts on saccade latency and errors, measured across two successive football seasons. Design: Participants were acquired from a sample of convenience—one Canadian university football team. Head impacts were collected during training camp, practices, eight regular season games, and four playoff games in each season. Saccade measurements were collected at five time points—before and after training camp, at midseason, after regular season, and after playoffs. Setting: Two seasons following players from a single USports football team during practices and games. Participants: Players who completed a baseline saccade measurement and a minimum of one follow-up measurement were included in the study. A total of 127 players were monitored across two competitive seasons, including 61 players who participated in both seasons. Independent Variables: Head impact measurements were collected using helmet-mounted sensors. Main Outcome Measures: Saccade latency and number of errors were measured using high-speed video or electro-oculography. Results: On average, each head impact increased prosaccade latency by 5.16 × 10−3 ms (95% confidence interval [CI], 2.26 × 10−4-1.00 × 10−2, P = 0.03) and antisaccade latency by 5.74 × 10−3 ms (95% CI, 7.18 × 10−4-1.06 × 10−2, P = 0.02). These latency increases did not decrease between the two seasons; in fact, prosaccade latencies were 23.20 ms longer (95% CI, 19.40-27.14, P < 0.001) at the second season's baseline measurement than the first. The number of saccade errors was not affected by cumulative head impacts. Conclusions: Repetitive head impacts in Canadian university football result in cumulative declines in brain function as measured by saccade performance. Clinical Relevance: Football organizations should consider implementing policies focused on reducing head impacts to improve player safety.

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Section: Discussionmentioning

confidence: 92%

Section: Saccade Apparatus and Proceduresmentioning

confidence: 99%

Section: Saccade Apparatus and Proceduresmentioning

confidence: 99%

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Effect of Repetitive Head Impacts on Saccade Performance in Canadian University Football Players

Brooks,

Dickey

2024

Clinical Journal of Sport Medicine

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“…The bipolar EOG electrodes [3] were placed near the canthus of both the eyes, with the reference electrode being placed in the middle of the forehead. Fig.…”

Section: Data Capturementioning

confidence: 99%

“…The amplitude of EOG ranges between 50 to 3500 µV, and its frequency components go from 0 to 100Hz [1]. EOG signals are usually contaminated with noise, and hence it introduces errors in parameter estimation [3]. The major interferences in the capture of EOG are:…”

Section: Introductionmentioning

confidence: 99%

Evaluation of denoising techniques for EOG signals based on SNR estimation

Dasgupta

Chakrborty

Chaudhuri

et al. 2016

2016 International Conference on Systems in Medicine and Biology (ICSMB)

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This paper evaluates four algorithms for denoising raw Electrooculography (EOG) data based on the Signal to Noise Ratio (SNR). The SNR is computed using the eigenvalue method. The filtering algorithms are a) Finite Impulse Response (FIR) bandpass filters, b) Stationary Wavelet Transform, c) Empirical Mode Decomposition (EMD) d) FIR Median Hybrid Filters. An EOG dataset has been prepared where the subject is asked to perform letter cancelation test on 20 subjects.

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