Abstract Ten out of 82 simple, complex and hypercomplex cells in areas 17 and 18 of the cat visual cortex responded with either rhythmic or nonrhythmic sustained firing patterns to movement stimulation. Sustained (X −) cells tended to show multimodal average response histograms with a dominant excitatory peak indicating organizational subdivision of their receptive fields. The dimensions of the excitatory centers ranged from 1.9 to 8.8°. Ocular dominance, orientation, directional selectivity and velocity discrimination were the same as known in regular cortical neurons. The differences between the responses to stationary and moving stimuli suggest that cells in the visual cortex can show either sustained or transient behavior, depending on the stimulus type.