On the function of cell systems in area 18. Part I.

Proceeding from previous studies on cells in area 18, neurophysiological experiments were carried out using combination of deterministic and statistical stimuli. The evaluation of the results on the space, time and amplitude characteristic of the cells show that for nearly all cells in this area, pattern distortion and shift due to motion are eliminated by spatial asymmetry of the coupling and specific combinations of on-off systems. So, the extraction of features despite pattern movement is possible in area 18. The features are extracted in the low spatial frequency range.