Impersistent execution of saccadic eye movements after traumatic brain injury

Brain Injury ◽  
1995 ◽  
Vol 9 (8) ◽  
pp. 769-775 ◽  
Author(s):  
I. Glass ◽  
Z. Groswasser ◽  
I. Groswasser-Reider
Keyword(s):  
Traumatic Brain Injury ◽  
Eye Movements ◽  
Brain Injury ◽  
Saccadic Eye Movements

scholarly journals Saccadic Eye Movements in Mild Traumatic Brain Injury: A Pilot Study OPEN ACCESS

2014 ◽  
Vol 41 (1) ◽  
pp. 58-65 ◽  
Author(s):  
Sarah J. Mullen ◽  
Yeni H. Yücel ◽  
Michael Cusimano ◽  
Tom A. Schweizer ◽  
Anton Oentoro ◽  
...  
Keyword(s):  
Traumatic Brain Injury ◽  
Eye Movements ◽  
Brain Injury ◽  
Pilot Study ◽  
Mild Traumatic Brain Injury ◽  
Neuropsychological Testing ◽  
Saccadic Eye Movements ◽  
Post Injury ◽  
Persistent Symptoms

Objective:To investigate whether repeat saccadic reaction time (SRT) measurements using a portable saccadometer is useful to monitor patients with mild traumatic brain injury (mTBI).Methods:Seven patients with newly-diagnosed mTBI and five agematched controls were prospectively recruited from an emergency Department. Saccadic eye movements, symptom self-reporting and neuropsychological tests were performed within one week of injury and again at follow-up three weeks post-injury. Control patients underwent saccade recordings at similar intervals.Results:Median saccade reaction times were significantly prolonged within one week post-injury in mTBI compared to controls. At follow-up assessment there was no significant between-groups difference. Changes in median SRT between the two assessments were not statistically significant. Four of the seven mTBI patients showed significantly increased SRT at follow-up; three of the mTBI patients and all controls showed no significant change. Among the three mTBI patients with persistent decreased SRT, two experienced loss of consciousness and reported the greatest symptoms, while the third was the only subject with significant decrease in neuropsychological testing scores at both assessments.Conclusion:In three of seven mTBI patients, saccadic eye movements remained delayed within three weeks post-injury. These three patients also showed persistent symptoms or no improvement on neuropsychological testing. This pilot study using a portable saccadometer suggests that comparing SRT from three weeks post-injury to that within one week of injury may be useful for early detection of a subpopulation at risk of persistent disability from mTBI. This finding suggests that further investigation in a large study population is warranted.

scholarly journals Filling in the gaps: Anticipatory control of eye movements in chronic mild traumatic brain injury

2015 ◽  
Vol 8 ◽  
pp. 210-223 ◽  
Author(s):  
Mithun Diwakar ◽  
Deborah L. Harrington ◽  
Jun Maruta ◽  
Jamshid Ghajar ◽  
Fady El-Gabalawy ◽  
...  
Keyword(s):  
Traumatic Brain Injury ◽  
Eye Movements ◽  
Brain Injury ◽  
Mild Traumatic Brain Injury ◽  
Anticipatory Control

scholarly journals The Measurement of Eye Movements in Mild Traumatic Brain Injury: A Structured Review of an Emerging Area

2020 ◽  
Vol 2 ◽  
Author(s):  
Samuel Stuart ◽  
Lucy Parrington ◽  
Douglas Martini ◽  
Robert Peterka ◽  
James Chesnutt ◽  
...  
Keyword(s):  
Traumatic Brain Injury ◽  
Eye Movements ◽  
Brain Injury ◽  
Mild Traumatic Brain Injury

Differential Eye Movements in Mild Traumatic Brain Injury Versus Normal Controls

2015 ◽  
Vol 30 (1) ◽  
pp. 21-28 ◽  
Author(s):  
David X. Cifu ◽  
Joanna R. Wares ◽  
Kathy W. Hoke ◽  
Paul A. Wetzel ◽  
George Gitchel ◽  
...  
Keyword(s):  
Traumatic Brain Injury ◽  
Eye Movements ◽  
Brain Injury ◽  
Mild Traumatic Brain Injury ◽  
Normal Controls

scholarly journals Ocular disconjugacy cannot be measured without establishing a solid spatial reference

F1000Research ◽  
2015 ◽  
Vol 4 ◽  
pp. 71 ◽  
Author(s):  
Jun Maruta
Keyword(s):  
Traumatic Brain Injury ◽  
Eye Movements ◽  
Brain Injury ◽  
Eye Tracking ◽  
Single Camera ◽  
Spatial Reference ◽  
Video Oculography ◽  
The Status

This correspondence points out a need for clarification concerning the methodology utilized in the study “Eye tracking detects disconjugate eye movements associated with structural traumatic brain injury and concussion”, recently published in Journal of Neurotrauma. The authors of the paper state that binocular eye movements were recorded using a single-camera video-oculography technique and that binocular disconjugate characteristics were analyzed without calibration of eye orientation. It is claimed that a variance-based disconjugacy metric was found to be sensitive to the severity of a concussive brain injury and to the status of recovery after the original injury. However, the reproducibility of the paper’s findings may be challenged simply by the paucity of details in the methodological description. More importantly, from the information supplied or cited in the paper, it is difficult to evaluate the validity of the potentially interesting conclusions of the paper.

scholarly journals Saccade and Fixation Eye Movements During Walking in People With Mild Traumatic Brain Injury

2021 ◽  
Vol 9 ◽  
Author(s):  
Ellen Lirani-Silva ◽  
Samuel Stuart ◽  
Lucy Parrington ◽  
Kody Campbell ◽  
Laurie King
Keyword(s):  
Traumatic Brain Injury ◽  
Eye Movements ◽  
Brain Injury ◽  
Eye Tracking ◽  
Mild Traumatic Brain Injury ◽  
Peak Velocity ◽  
Lumbar Vertebrae ◽  
Gait Velocity ◽  
The Impact ◽  
Mobile Eye Tracking

Background: Clinical and laboratory assessment of people with mild traumatic brain injury (mTBI) indicate impairments in eye movements. These tests are typically done in a static, seated position. Recently, the use of mobile eye-tracking systems has been proposed to quantify subtle deficits in eye movements and visual sampling during different tasks. However, the impact of mTBI on eye movements during functional tasks such as walking remains unknown.Objective: Evaluate differences in eye-tracking measures collected during gait between healthy controls (HC) and patients in the sub-acute stages of mTBI recovery and to determine if there are associations between eye-tracking measures and gait speed.Methods: Thirty-seven HC participants and 67individuals with mTBI were instructed to walk back and forth over 10-m, at a comfortable self-selected speed. A single 1-min trial was performed. Eye-tracking measures were recorded using a mobile eye-tracking system (head-mounted infra-red Tobbii Pro Glasses 2, 100 Hz, Tobii Technology Inc. VA, United States). Eye-tracking measures included saccadic (frequency, mean and peak velocity, duration and distance) and fixation measurements (frequency and duration). Gait was assessed using six inertial sensors (both feet, sternum, right wrist, lumbar vertebrae and the forehead) and gait velocity was selected as the primary outcome. General linear model was used to compare the groups and association between gait and eye-tracking outcomes were explored using partial correlations.Results: Individuals with mTBI showed significantly reduced saccade frequency (p = 0.016), duration (p = 0.028) and peak velocity (p = 0.032) compared to the HC group. No significant differences between groups were observed for the saccade distance, fixation measures and gait velocity (p > 0.05). A positive correlation was observed between saccade duration and gait velocity only for participants with mTBI (p = 0.025).Conclusion: Findings suggest impaired saccadic eye movement, but not fixations, during walking in individuals with mTBI. These findings have implications in real-world function including return to sport for athletes and return to duty for military service members. Future research should investigate whether or not saccade outcomes are influenced by the time after the trauma and rehabilitation.

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