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Biomedical subjects

V A Filin

Publications and source records attributed to V A Filin.

At least 19 recordsLinked to original sources
PubMed1977

[Use of a photoelectronic device for recording micromovements of the eyes in neurologic clinical practice].

A photoelectronic device was used to record micromovements of the eyes in 110 patients with disorders of the functions of the oculomotor apparatus (myasthenia, myopathia, malignant exophthalm, basal paralysis, nuclear paralysis, cerebral tumours). The number of spontaneous leaps, their direction, amplitude and the rate of reflex and spontaneous leaps were counted up; on the basis of this an assymetry coefficient which made it possible to qualitatively evaluate the degree of the oculomotor apparatus affection was calculated, this plays a significant part in neurological practice.

Brain Neoplasms↗
PubMed1977

[Micromovements of the eyes in isolated pareses and paralyses of the abducens and oculomotor nerves].

Micromovements of the eye were studied in 18 patients with immobile point fixation, without a point, with an extreme eye abduction. A reduction of the number of involuntary saccades attributable to the paralyzed muscle, and increase in frequency and in the amplitude of the drift were revealed. The above changes in the micromotions of the eye correlate with the volume of the movement; the less the volume of the movement, the less the number of saccades and the larger the amplitude and the frequency of the drift. At the same time the characteristics of fast movements changed (involuntary jerks, reflex saccades and and saccades of the extreme position), the latter also correlating with the volume of the movements; along with the reduction of the volume of the movement the amplitude was decreasing as low as disappearing.

Abducens Nerve↗
PubMedDate not supplied

[The effect of illumination on involuntary eye saccades].

A study was made of the influence of sudden illumination micromovements of the eyes. Sudden contour illumination of the eye by a 15 degrees field with a crossing in the centre and a brightness of 100 nit reduced the amplitude of involuntary saccades and their frequency. The effect was particularly distinct with preliminary recording of the eye micromovement in complete darkness without a fixation point. In the case of fixation of a stationary point with one eye and of illumination of the other, the effect was also manifest, but it was less pronounced. During illumination of the eye with diffused light (through spectacles with frosted glasses) the effect of diminution of the saccade amplitude was smaller, though the brightness remained unchanged. A decrease in the saccade amplitude was practically not observed when the point was fixed at diffuse illumination. It has also been shown that with greater brightness of the fixation point (0.3; 25; 92 and 1000 nit), the amplitude and frequency of involuntary saccades diminish. The results attest that in choosing the conditions of work of the saccadic system two factors should be taken into consideration: the presence of the contours of the visible object and its brightness, the latter by itself having a lesser effect than the former.

Eye Movements↗