Bedside evaluation of smooth pursuit eye movements in acute sensory stroke patients

Johkura, Ken; Kawabata, Yuichi; Amano, Yu; Kudo, Yoshihisa; Murata, Hiroya; Kirimura, Susumu; Funabiki, Kazuo

doi:10.1016/j.jns.2014.12.013

Cited by 4 publications

(7 citation statements)

References 9 publications

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“…A laser pointer projected onto the ceiling was used as the visual target for horizontal saccades and smooth pursuit eye movements. 1 For horizontal saccades, the laser pointer jumped randomly 15º either in the right or left direction from the mid position at random intervals. For horizontal smooth pursuits, the laser pointer moved according to a sine curve velocity profile with an amplitude of 30º and a frequency of 0.3Hz.…”

Section: Methodsmentioning

confidence: 99%

“…For horizontal smooth pursuits, the laser pointer moved according to a sine curve velocity profile with an amplitude of 30º and a frequency of 0.3Hz. 1 Participants were instructed to track the laser pointer.…”

Section: Methodsmentioning

confidence: 99%

“…Corp., Kyoto, Japan). [1][2][3][4] Before testing with a visual target randomly appearing or moving, eye position was calibrated by fixing on a 15º right and 15º left target for 4s. Participants…”

Section: Methodsmentioning

confidence: 99%

“…Recently, VOG has become more popular than EOG for the measurement of eye movements because it is an easier technique. 1 However, characteristics of monocular recording using VOG may differ from those of binocular recording using EOG. The aim of this study was to examine the characteristics of monocular movements recorded using VOG.…”

Section: Introductionmentioning

confidence: 99%

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Adduction-Abduction Asymmetry in Saccades During Video-Oculographic Monocular Recording: A Word of Caution

Koji

Tanaka

Kudo

et al. 2019

Neuro-Ophthalmology

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In eye movement examination, video-oculographic monocular recording has become more popular than electro-oculographic binocular recording. The aim of this study was to examine the characteristics of monocular movements recorded using video-oculography. In 66 healthy subjects, the horizontal saccades and smooth pursuit eye movements of the right eye within a range of 30º were evaluated using a video-oculographic eye movement recording system. Saccade latency, velocity, accuracy, and smooth pursuit gain were measured and analysed by age and direction. Saccade parameters (latency, velocity, and amplitude) and smooth pursuit gain deteriorated with age in healthy subjects. Saccade velocity and accuracy were significantly larger during adduction than during abduction. The smooth pursuit gain did not differ between adduction and abduction. In conclusion, unlike smooth pursuit eye movements, saccadic eye movements have adduction-abduction asymmetry. In video-oculographic monocular recording of saccades, it is necessary to recognise the possibility of the existence of adduction-abduction asymmetry.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Adduction-Abduction Asymmetry in Saccades During Video-Oculographic Monocular Recording: A Word of Caution

Koji

Tanaka

Kudo

et al. 2019

Neuro-Ophthalmology

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“…When comparing eye movement records taken by ENG and VOG, the latter has superior features: good spatial resolution, accurate recording of vertical components, and provides technical simplicity when performing recordings. SPEM measurement using VOG has been previously reported as a useful method for examinations of head trauma and stroke, in which quantitative analysis was used to compare patient and healthy groups [4,5], and for comparing fi ndings between multiple sclerosis and Parkinson's disease [6]. However, VOG is considered relatively expensive [7].…”

Section: Spem Can Be Measured Using Two Methodsmentioning

confidence: 99%

Quantitative Analysis of Smooth Pursuit Eye Movement Using Video-Oculography

Yamashita¹

2018

Arch Otolaryngol Rhinold

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Background: Abnormalities of smooth pursuit eye movement (SPEM) are a clinical fi nding in central equilibrium disorders; the evaluation of SPEM using video-oculography (VOG) has therefore been conducted clinically in recent years. However, evaluation criteria for determining a saccadic pattern have yet to be clearly defi ned. The context and purpose of the study: Here, we report SPEM using VOG performed with commercially available equipment. The results were then quantitatively evaluated. Methods: Twelve patients treated at the Department of Otolaryngology at our hospital underwent SPEM testing using both electronystamography (ENG) and VOG. Eye movements were binarized using ImageJ software; these data were used for statistical analysis. Evaluation criteria included the number of saccadic eye movements, average eye movement velocity, average difference between target and eye movement velocities, and phase lag between target and eye movements. Results: We examined a healthy pattern group (n=6) and saccadic pattern group (n=6). A signifi cant difference between the healthy and saccadic pattern groups was identifi ed in the number of saccadic eye movements, average eye movement velocity, and average difference between target and eye movement velocities. Conclusion: Quantitative evaluation of SPEM using VOG was possible, and it facilitated the identifi cation of useful evaluation criteria. Potential implication: As SPEM testing can non-invasively evaluate brain stem and cerebellar function, screening is possible using this simple method.

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