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Horizontal Eye Position Affects Measured Vertical VOR Gain on the Video Head Impulse Test

Overview of attention for article published in Frontiers in Neurology, March 2015
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Title
Horizontal Eye Position Affects Measured Vertical VOR Gain on the Video Head Impulse Test
Published in
Frontiers in Neurology, March 2015
DOI 10.3389/fneur.2015.00058
Pubmed ID
Authors

Leigh A. McGarvie, Marta Martinez-Lopez, Ann M. Burgess, Hamish G. MacDougall, Ian S. Curthoys

Abstract

With the video head impulse test (vHIT), the vertical VOR gain is defined as (vertical eye velocity/vertical head velocity), but compensatory eye movements to vertical canal stimulation usually have a torsional component. To minimize the contribution of torsion to the eye movement measurement, the horizontal gaze direction should be directed 40° from straight ahead so it is in the plane of the stimulated canal plane pair. as gaze is systematically moved horizontally away from canal plane alignment, the measured vertical VOR gain should decrease. Ten healthy subjects, with vHIT measuring vertical eye movement to head impulses in the plane of the left anterior-right posterior (LARP) canal plane, with gaze at one of five horizontal gaze positions [40°(aligned with the LARP plane), 20°, 0°, -20°, -40°]. Every head impulse was in the LARP plane. The compensatory eye movement was measured by the vHIT prototype system. The one operator delivered every impulse. The canal stimulus remained identical across trials, but the measured vertical VOR gain decreased as horizontal gaze angle was shifted away from alignment with the LARP canal plane. In measuring vertical VOR gain with vHIT the horizontal gaze angle should be aligned with the canal plane under test.

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Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 70 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Brazil 1 1%
Unknown 69 99%

Demographic breakdown

Readers by professional status Count As %
Student > Master 13 19%
Researcher 10 14%
Other 7 10%
Student > Ph. D. Student 6 9%
Student > Doctoral Student 4 6%
Other 17 24%
Unknown 13 19%
Readers by discipline Count As %
Medicine and Dentistry 34 49%
Neuroscience 8 11%
Nursing and Health Professions 6 9%
Psychology 2 3%
Agricultural and Biological Sciences 2 3%
Other 3 4%
Unknown 15 21%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 17 March 2015.
All research outputs
#20,265,771
of 22,796,179 outputs
Outputs from Frontiers in Neurology
#8,689
of 11,668 outputs
Outputs of similar age
#242,412
of 286,345 outputs
Outputs of similar age from Frontiers in Neurology
#71
of 85 outputs
Altmetric has tracked 22,796,179 research outputs across all sources so far. This one is in the 1st percentile – i.e., 1% of other outputs scored the same or lower than it.
So far Altmetric has tracked 11,668 research outputs from this source. They typically receive a little more attention than average, with a mean Attention Score of 7.4. This one is in the 1st percentile – i.e., 1% of its peers scored the same or lower than it.
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