EMMA — an eye movement measurement and analysis system

Muir, S. R.; MacAskill, Michael R.; Herron, Donald A.; Goelz, H.; Anderson, Tim; Jones, Richard D.

doi:10.1007/bf03178692

Cited by 8 publications

(1 citation statement)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The assessment methods, paradigm parameters, and key measures of motor performance were identical to an earlier study and have been described in detail elsewhere [44,46,55]. Eye movements were recorded using an IRIS infrared limbus tracker (Skalar Medical, BV, Delft, The Netherlands) [56].…”

Section: Oculomotor Testingmentioning

confidence: 99%

Mild head injury—a close relationship between motor function at 1 week post-injury and overall recovery at 3 and 6 months

Heitger

Jones

Dalrymple‐Alford

et al. 2007

Journal of the Neurological Sciences

View full text Add to dashboard Cite

Based on previous findings of impaired eye and arm motor control after mild closed head injury (CHI), this study examined whether early eye and arm motor function, and the level of post-injury cerebral dysfunction manifested in motor control, relates systematically to recovery at 3 and 6 months after mild CHI. At 1 week post-injury, we assessed oculomotor function, upper-limb visuomotor performance, and cognitive status in 37 mild CHI patients. Re-examination at 3 and 6 months determined outcome in terms of postconcussional symptoms and performance of everyday tasks, as assessed by the Rivermead Postconcussion Symptoms Questionnaire, the Rivermead Head Injury Follow-up Questionnaire and the SF-36 Health Survey. We then examined the association of early motor function, cognitive status and self-reported health condition with outcome using linear regression. Motor-based regression models explained a high proportion of the variance in outcome (70-89%), with motor function at 1 week being more closely related to outcome at 3 and 6 months than early psychometric assessment (13-32%) or self-reported health status (54-79%). These motor-based models incorporated subcortical/subconscious motor functions alongside motor functions that are subject to volitional control and are primarily mediated by frontal, parietal and temporal cortical brain regions. Early assessment of eye and arm motor function may help in improving accuracy of outcome prediction after mild CHI. Such assessment may assist in the better targeting of early health care intervention and help decrease head-trauma-related morbidity and rehabilitation costs.

show abstract

Section: Oculomotor Testingmentioning

confidence: 99%

Mild head injury—a close relationship between motor function at 1 week post-injury and overall recovery at 3 and 6 months

Heitger

Jones

Dalrymple‐Alford

et al. 2007

Journal of the Neurological Sciences

View full text Add to dashboard Cite

show abstract

Memory-guided saccades in Parkinson’s disease: long delays can improve performance

Heron¹,

MacAskill

Anderson

2004

Exp Brain Res

View full text Add to dashboard Cite

A recent study in control subjects suggested the existence of separate pathways for oculomotor spatial working memory tasks depending on whether the delay before movement execution is either short or long (>20 s). The long delay pathway might bypass brain areas commonly affected by Parkinson's disease (PD). This study aimed to assess spatial working memory in Parkinson's disease using short (3 s) and long (30 s) delays in a memory-guided saccade task. Fifteen mild-moderately affected PD subjects off-medication, and 15 age and sex-matched controls were tested (PD mean age 65.3; control 65.9). Subjects were tested in a darkened room using a horizontal LED bar to generate eye movements which were recorded using an infrared limbus tracker. Percentage error in amplitude of the primary saccade was analysed by repeated measures ANOVA. There was a significant interaction between the groups and their response to the short and long delay periods (P<0.02). PD subjects were more strongly impaired in the short delay than the long delay trials when compared with controls. Analysis of the percentage error in amplitude of the final eye position showed the same pattern but only in female subjects. This study provides the first evidence that the proposed parallel spatial memory pathway utilised in longer delay periods is relatively unimpaired in PD. In a broader sense, our results suggest there might be other alternative pathways to overcome deficits in functions impaired by PD.

show abstract

The impact of mild closed head injury on involuntary saccadic adaptation: Evidence for the preservation of implicit motor learning

Heitger¹,

MacAskill²,

Jones³

et al. 2005

Brain Injury

View full text Add to dashboard Cite

No differences in adaptation were found between the CHI group and the controls (F(1, 29) = 0.51, p = 0.48). This finding indicates that mild CHI does not impair implicit reflexive saccade adaptation and suggests that cerebellar function and functions of deeper brain structures such as the thalamus, superior colliculus and the basal ganglia may be largely preserved following mild CHI. The current results support the notion that the profile of oculomotor function after mild CHI reflects a centripetal gradient of impairment and relates closely to the functional integrity of the injured brain.

show abstract

EMMA — an eye movement measurement and analysis system

Cited by 8 publications

References 6 publications

Mild head injury—a close relationship between motor function at 1 week post-injury and overall recovery at 3 and 6 months

Mild head injury—a close relationship between motor function at 1 week post-injury and overall recovery at 3 and 6 months

Memory-guided saccades in Parkinson’s disease: long delays can improve performance

The impact of mild closed head injury on involuntary saccadic adaptation: Evidence for the preservation of implicit motor learning

Contact Info

Product

Resources

About