Galina I Rozhkova

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Accurate measurements of uncorrected binocular and monocular visual acuity were performed in 65 children aged 5-7 years at five viewing distances in the range 0.5-5.0 m by means of the test charts containing widely spaced E stimuli in four orientations. It was found that, in most children of this age, visual acuity (V) changed with test distance, as had(More)
Perception of stabilized retinal stimuli was studied both in monocular and dichoptic viewing conditions. When identical stabilized stimuli of large size and high luminance were presented to both eyes, the phenomena characteristic of monocular perception (rapid fading of perceived images within a few seconds or their episodic disappearance and regeneration)(More)
  • G. I. Rozhkova, H. I. Rodionova, A. V. Popov
  • 2004
Cercal systems of seven insect species (cricketMelanogryllus desertus, mole cricketGryllotalpa gryllotalpa, katydidsPholidoptera pustulipes andTettigonia viridissima, cockroachesPeriplaneta americana andBlatta orientalis, and locustLocusta migratoria) were examined for direction-sensitive giant interneurons (GIs) that are excited by cercal receptors but(More)
The giant interneurons in the terminal abdominal ganglion of cricket (Acheta domesticus) were studied using sound signals with special interest to the effect of the body tilt on the directional sensitivity diagrams. The neurons under study receive their inputs from the cerci which have receptors sensitive to mechanic and acoustic stimulation and receptors(More)
A model of signal processing in the insect mechano-acoustical cercal system is considered which maintains consistency in the directional detection of air flow and in relation to the position of the sensory organs (cerci) by means of connections between four central neurons and certain groups of receptors located on both cerci. The monocercal mechanism for(More)
A method of assessing fusional reserves using an interactive computer program, which allows to monitor the subjects report on the moment of fusion break with artificial increase of convergence or divergence of the vii sual axes in the measurement process was developed and tested. Control is achieved through the use of a purely binocular stimuli--random-dot(More)
Directional sensitivity of the abdominal giant fibers of the cricket to auditory stimulation has been investigated with special interest to the effect of the cerci position on the directional sensitivity of the giant neurons of the terminal abdominal ganglion. It has been shown that at least for some giant neurons the preferred directions of stimulation are(More)
Changes in the spatial orientation of three-dimensional directional sensitivity diagrams of neurons of the terminal abdominal ganglion of the cricket during body tilting were studied. Spike responses were recorded from neurons of the ganglion to acoustic stimuli in different directions, with the cricket's body tilted at different angles to the horizontal(More)
Stimulation with linearly changing signals was used to study identified neurons 10-3a and 9-lb of the cereal system of the cricket with the aim of identifying which parameter of the wind stimulus (speed, acceleration, etc.) determined their responses. The results showed that the factor affecting neuron 10-3a was acceleration of the airflow, wile the(More)