Dynamic EOG by Metrovision

Description
This program is designed for the study of ocular motility functions:
 fixations,
 saccades,
 pursuits,
 optokinetic nystagmus (OKN).
The dynamic EOG signals are recorded with the bioelectric recording unit.
Stimulator :
Signal acquisition :
Universal stimulator
The bioelectric amplifier with 4 input channels is highly
recommended to take full advantage of simultaneous
recording of horizontal and vertical eye movements.
Beckmann type electrodes are recommended to achieve
optimal recording quality.
Reference : HVM-MonPack
It is used to generate the different visual targets targets
(points for adults and images for children) as well as visual
stimulations for OKN.
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Specifications
The program can display up to 14 simultaneous
channels:
 2 channels for the stimulation (horizontal
and vertical components),
 12 channels including the position, velocity
and acceleration for each of the horizontal
and vertical component of each eye.
Parameters used for the acquisition of data are:
Resolution
1,5 uV
Sampling frequency
680 Hz
Maximum recording duration
72 secondes
© 2014 Metrovision
PVM-EO
Version 19/06/2014
METROVISION 4 rue des Platanes 59840 PERENCHIES France : 33 3 20 17 19 57 : 33 3 20 17 19 51 http: //www.metrovision.com [email protected]
Analysis of horizontal and vertical saccades
The program allows the calibration of eye movements (to convert measurements from microvolts to degrees of visual
angle).
After the calibration, the program can calculate the
eye velocity during saccades and make a detailed
analysis including:
 the amplitude of the saccade,
 the maximum velocity,
 the average velocity (over the duration of the
saccade),
 the latency (time between the stimulus and
the beginning of the saccade),
 the asymmetry (ratio between the duration
of the acceleration phase and the duration of
deceleration).
Analysis of pursuits and nystagmus
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The program calculates the velocity gain of the smooth movement.
References
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ORSSAUD C., INGSTER-MOATI I., ROCHE O., BUI-QUOC E., DUFIER J.L. Familial congenital oculomotor apraxia:
Clinical and electro-oculographic features. European Journal of Paediatric Neurology. 2009, 13, 4, 370-372.
INGSTER-MOATI I., & al, Ocular motility and Wilson's disease: A study on 34 patients. J. Neurol. Neurosurg.
Psychiatry, 2007, 78, 1199-1201.
INGSTER-MOATI I. & al. Vertical and horizontal smooth pursuit eye movements in children: A neurodevelopmental study. European Journal of Paediatric Neurology. 2009, 13, 4, 362-366.
VAIVRE-DOURET L., LALANNE C., INGSTER-MOATI I. & al. Subtypes of developmental coordination disorder:
research on their nature and etiology. Developmental Neuropsychology. 2011, 36(5), 614–643.
© 2014 Metrovision
METROVISION 4 rue des Platanes 59840 PERENCHIES France : 33 3 20 17 19 57 : 33 3 20 17 19 51 http: //www.metrovision.com [email protected]

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