Biomedical subjects
Publications and source records attributed to T A Shcherbach.
Two-dimensional spatial-frequency characteristics of receptive fields were obtained when investigating with sinusoidal gratings of different spatial frequency and orientation. The optimal spatial frequency does not change with orientation. Theoretical analysis of the role of limited size of RF shows that RF must be broadband in frequency and orientation. The results show that RF are grating filters.
Spatial frequency characteristics of the cortical receptive fields obtained with sinusoidal gratings were investigated on the background formed by orthogonally oriented gratings or on the homogenous background. The results correspond to the conjecture that the receptive fields as spatial frequency filters are linear independent in orientation.
Velocity ranges exist for complex and simple receptive fields of cat's visual cortex. In these ranges there is a narrow band frequency tuning. In these velocity ranges the location of the maximum on frequency characteristics is constant and does not depend on the velocity of stimulating lattice movement. An increase of the movement velocity brings about a reduction of the reaction value of the receptive fields and a disappearance of the narrow band tuning expressed in the optimal velocity range.