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Biomedical subjects

M A Rudneva

Publications and source records attributed to M A Rudneva.

6 recordsLinked to original sources
PubMedDate not supplied

[Critical frequency of light flickering rhythm reproduction in visual evoked potentials: physiological essence of the method].

Critical frequency of light flickering rhythm reproduction in visual evoked potentials (CFLF) was studied in 25 patients (35 eyes) with partial optic nerve atrophy, 4 patients (7 eyes) with moderate changes in the optic route suprachiasmal sections, and 23 normal subjects; automated static perimetry and visometry were carried out as well. CFLF was found reduced in the majority of patients with optic nerve atrophy, whereas in suprachiasmal involvement this parameter remained within the normal range. CFLF values were in good correlation with vision acuity and light sensitivity of visual field sites within the angle of 15 degrees from the center (the correlation was higher for foveal light sensitivity when it was expressed in relative units, and for light sensitivity of paracentral visual field sites when expressed in logarithmic units). The authors come to a conclusion that CFLF functional and anatomic substrate is the foveal area cortical projection sites and, to a lesser degree, cortical projection sites of visual field sites within 15 degrees from the center; in optic nerve atrophy CFLF values depend on the status of the optic nerve sections (the axial bundle) corresponding to a certain visual field site.

Adolescent↗
PubMedDate not supplied

[A multifunctional microcomputer pattern-stimulator].

The authors review a complex of the hardware and software for the design of an automated multi-functional pattern-stimulator based on a microprocessor KR1810BM86A with a possibility of exercising remote control via the RS-232C channel and autonomous work controlled by a built-in keyboard and a matrix display. The stimulator is capable of forming multi-pattern stimulation images with angular resolution of one element of the eye retina as well as of performing different stimulation types within a wide range of intensities and colours. The software of the stimulator represents a multi-task operative system in the real time mode.

Computers↗
PubMedDate not supplied

[Dynamic functional and electrophysiological indices in patients with complicated high myopia after revascularizing operations].

Vision acuity and differential photosensitivity were examined, and electroretinography and electrooculography data analyzed in patients with high myopia after crossing the superficial temporal artery. A tendency to normalization of these parameters has been observed after surgery, due to improvement of the circulation in the orbital artery basin, as evidenced by ultrasonic dopplerography. The method of automated statistical perimetry was found valuable for predicting the functional results of surgery and for objective assessment of visual functions postoperation.

Adolescent↗