Auditory, Vestibular and Cognitive Effects due to Repeated Blast Exposure on the Warfighter

Casto, Kristen L.; Nedostup, Amy E.

doi:10.21236/ada581394

Cited by 3 publications

(3 citation statements)

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“…Despite vestibular effects of concussion reported elsewhere,10,11,18,19,26 vestibular deficits were absent from our results. Importantly, the VNG device used in this study did not have the most robust tests of vestibular function, such as full body rotation tests.…”

Section: Discussioncontrasting

confidence: 99%

“…A growing number of studies have investigated the effects of head injuries and concussions on oculomotor,9–25,32–37 vestibular,10,11,18,19,26 and reaction time 27–30 (OVRT) performance. In this study we investigated whether combined OVRT measures can reliably distinguish concussed subjects from similarly aged controls in a population of high school students.…”

Section: Discussionmentioning

confidence: 99%

“…An innovative adjunct to current concussion assessment practice is to use high spatial and temporal resolution measurements of eye movement reflexes and responses to specific stimuli or tasks, generally known as video-oculography. Aberrations in eye movements in saccades, smooth pursuit, nystagmus, and vergence have proven to be informative indicators of brain injury,9–25 as have measurements of vestibular functions,10,11,18,19,26 and reaction time performance 27–30…”

mentioning

confidence: 99%

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Oculomotor, Vestibular, and Reaction Time Effects of Sports-Related Concussion: Video-Oculography in Assessing Sports-Related Concussion

Kelly¹,

Kiderman²,

Akhavan³

et al. 2019

Journal of Head Trauma Rehabilitation

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Objective: The purpose of the study was to test the ability of oculomotor, vestibular, and reaction time (OVRT) metrics to serve as a concussion assessment or diagnostic tool for general clinical use. Setting and Participants: Patients with concussion were high school-aged athletes clinically diagnosed in a hospital setting with a sports-related concussion ( n = 50). Control subjects were previously recruited male and female high school student athletes from 3 local high schools ( n = 170). Design: Video-oculography was used to acquire eye movement metrics during OVRT tasks, combined with other measures. Measures were compared between groups, and a subset was incorporated into linear regression models that could serve as indicators of concussion. Measures: The OVRT test battery included multiple metrics of saccades, smooth pursuit tracking, nystagmoid movements, vestibular function, and reaction time latencies. Results: Some OVRT metrics were significantly different between groups. Linear regression models distinguished control subjects from concussion subjects with high accuracy. Metrics included changes in smooth pursuit tracking, increased reaction time and reduced saccade velocity in a complex motor task, and decreased optokinetic nystagmus (OKN) gain. In addition, optokinetic gain was reduced and more variable in subjects assessed 22 or more days after injury. Conclusion: These results indicate that OVRT tests can be used as a reliable adjunctive tool in the assessment of concussion and that OKN results appear to be associated with a prolonged expression of concussion symptoms.

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Section: Discussioncontrasting

confidence: 99%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

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Oculomotor, Vestibular, and Reaction Time Effects of Sports-Related Concussion: Video-Oculography in Assessing Sports-Related Concussion

Kelly¹,

Kiderman²,

Akhavan³

et al. 2019

Journal of Head Trauma Rehabilitation

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Normative data for ages 18‐45 for ocular motor and vestibular testing using eye tracking

Kullmann

Ashmore

Braverman

et al. 2021

Laryngoscope Investig Oto

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Objective Eye tracking technology has been employed in assessing ocular motor and vestibular function following vestibular and neurologic conditions, including traumatic brain injury (TBI). Assessments include tests that provide visual and motion (rotation) stimuli while recording horizontal, vertical, and torsional eye movements. While some of these tests have shown diagnostic promise in previous studies, their use in clinical practice is limited by the lack of normative data. The goal of this study was to construct normative reference ranges to be used when comparing patients' results. Methods Optokinetic response, subjective visual horizontal and vertical, and rotation tests were administered to male and female volunteers, ages 18‐45, who were free from neurological, vestibular disorders, or other head injuries. Tests were administered using either a rotatory chair or a portable virtual reality‐like goggle equipped with video‐oculography. Results Reference values for eye movements in response to different patterns of stimuli were analyzed from 290 to 449 participants. Analysis of gender (self‐reported) or age when grouped as pediatric (late adolescent; 18‐21 years of age) and adult (21‐45 years of age) revealed no effects on the test metrics. Data were pooled and presented for each test metric as the 95% reference interval ( RI ) with 90% confidence intervals ( CI ) on upper and lower limits of the RI. Conclusions This normative database can serve as a tool to aid in diagnosis, treatment, and/or rehabilitation protocols for vestibular and neurological conditions, including mild TBI (mTBI). This database has been cleared by the FDA for use in clinical practice (K192186). Level of evidence 2b

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Blast mild traumatic brain injury is associated with increased myopia and chronic convergence insufficiency

et al. 2021

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Auditory, Vestibular and Cognitive Effects due to Repeated Blast Exposure on the Warfighter

Cited by 3 publications

References 0 publications

Oculomotor, Vestibular, and Reaction Time Effects of Sports-Related Concussion: Video-Oculography in Assessing Sports-Related Concussion

Oculomotor, Vestibular, and Reaction Time Effects of Sports-Related Concussion: Video-Oculography in Assessing Sports-Related Concussion

Normative data for ages 18‐45 for ocular motor and vestibular testing using eye tracking

Blast mild traumatic brain injury is associated with increased myopia and chronic convergence insufficiency

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