Shaposhnikov D.G., Gizatdinova Yu.F., and Podladchikova L.N.
A.B. Kogan Research Institute for Neurocybernetics,
Rostov State University, Rostov-on-Don, Russia
Experimental data on the local spatial nonuniformity of the acuity of sensory tuning in the human peripheral vision field are presented. In addition to the known macrodynamics of visual acuity in the direction from the fovea to the periphery estimated in a series of 10° areas of the field of vision, a local alteration of highand low-selective microareas with periods of 4°-8° is demonstrated. The subject's reaction time in response to stimuli and the parameters of eye movements were used to estimate the subject's functional state during the experiment. Local nonuniformity can be related to the basic mechanisms of context encoding of the foveal information and determine priority in choosing the next fixation point prior to estimating the perceptual importance of the object.