Posturography as Biomarker of Oculomotor and Postural Control Integration
| Status: | Enrolling by invitation |
|---|---|
| Healthy: | No |
| Age Range: | 18 - Any |
| Updated: | 7/20/2017 |
| Start Date: | April 2016 |
| End Date: | April 2019 |
Determine the effects looking in certain direction or moving the eyes in a certain way have
on the ability of a subject to maintain equilibrium in different circumstances (eyes
open/closed, and standing on hard or compliant surface, with the head straight or rotated
right or left, flexed or extended).
on the ability of a subject to maintain equilibrium in different circumstances (eyes
open/closed, and standing on hard or compliant surface, with the head straight or rotated
right or left, flexed or extended).
Subjects will undergo computerized dynamic posturography (CDP) testing using the extended
modified Clinical Testing of Sensory Integration in Balance (ext_mCTSIB) protocol: the
subjects will be required to stand on a hard or the compliant surface in a comfortable
posture, feet shoulder width, with eyes open or closed, arms to the side and free to move,
gazing forward, and breathing normally, with head straight, turned right or left, flexed or
extended. This testing will be used to determine the health status of the subjects.
Then a sequence of tests will be performed (they could be done in different days to avoid
fatiguing the subject): each sequence will comprise of a baseline test in one of the
ext_mCTSIB testing conditions and a subsequent test in the same conditions but with an
oculomotor additional task, such as gazing in a specific direction other than straight,
performing saccades in different directions, at different speed and using different paradigms
(prosaccades, antisaccades, to a remembered target, gap saccades, …), following a target
moving on the screen at different speed and in different directions, receiving an optokinetic
stimulation in different directions and at different speeds. Video recordings of the eyes
movement may be done to make sure that the subject is actually moving the eyes, to verify
that the observers are well trained to detect and count the saccadic movements, as well as to
obtain quantitative information regarding the eye movements per se.
modified Clinical Testing of Sensory Integration in Balance (ext_mCTSIB) protocol: the
subjects will be required to stand on a hard or the compliant surface in a comfortable
posture, feet shoulder width, with eyes open or closed, arms to the side and free to move,
gazing forward, and breathing normally, with head straight, turned right or left, flexed or
extended. This testing will be used to determine the health status of the subjects.
Then a sequence of tests will be performed (they could be done in different days to avoid
fatiguing the subject): each sequence will comprise of a baseline test in one of the
ext_mCTSIB testing conditions and a subsequent test in the same conditions but with an
oculomotor additional task, such as gazing in a specific direction other than straight,
performing saccades in different directions, at different speed and using different paradigms
(prosaccades, antisaccades, to a remembered target, gap saccades, …), following a target
moving on the screen at different speed and in different directions, receiving an optokinetic
stimulation in different directions and at different speeds. Video recordings of the eyes
movement may be done to make sure that the subject is actually moving the eyes, to verify
that the observers are well trained to detect and count the saccadic movements, as well as to
obtain quantitative information regarding the eye movements per se.
Inclusion Criteria:
- Self assessed healthy subjects
Exclusion Criteria:
- subjects suffering from pathology known to affect balance
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