[Selectivity of the neuronal responses of the human brain to different angular orientations of visual stimuli].

In parkinsonic patients with long-term intracerebral electrodes implanted into different nuclei of the thalamus and striopallidar complex the neuronal impulse activity was recorded during visual testing for orientation sensitivity. Visual testing revealed significant responses in multiple unit activity of studied neuronal populations to the angular orientations of the presented stimuli differing from background stimulus orientation. This responses were spatially specific and were not the result of modulation of the activity of these units by the common afferent signal.