Evaluation of Gaze Stability by Eye Tracking Method in Patients with MedulloblastomaстатьяТезисы
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 10 августа 2018 г.
Аннотация:We assessed the feasibility of a test of
gaze stabilization on a target in patients with medulloblastoma.
Patients underwent a standard course of rehabilitation
in Rehab Centre “Russian Field” (Chekhov, Russian Federation).
Five patients (three girls and two boys, aged 13.4-17.9
years) and eight normal subjects (three girls and five boys,
aged 10.6-15.2 years) participated in the study. Eye movementswere
recorded by Arrington Research 60 Hz eye tracker.
In experiments the participants performed the gaze stabilization
test (GST) involved the focusing on the four targets (left
and right, up and down at ±19◦ and ±11◦ of eccentricities,
respectively). Two GST sessions were carried out during first
and second rehabilitation courses separated by 3.2-9.2months
interval.
Results: The gaze dispersion in patients were higher compared
with that in normal subjects (p<0.0001). Such instability
relates foremost to oculomotor control disorders in
patientswhich manifest in macrosaccadic oscillations, nystagmus,
intrusive saccades, and square wave jerks. A decrease of
gaze dispersion in four patients (p<0.0001 for each) occurred
in the second GST session, presumably caused by reduction
of intrusive saccades frequency and context inappropriate saccades
both representing higher efficacy of voluntary attention
control.
Conclusions: Patients with medulloblastoma demonstrated
poor gaze stability compared to normal subjects. The positive
dynamics of gaze stability in patients has been achieved
by rehabilitation courses. Eye movement patterns could be
considered as objective indicators of specific oculomotor disorders.
Eye tracking method represents additional diagnostic
tool in rehabilitation practice.