The Journal of physiology
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The rabbit's striate cortex contains a variety of receptive-field types, including concentric, uniform, simple and complex types. The spatial summation of these receptive fields was studied. Two types of linearity tests were performed: null tests and drifting grating tests. ⋯ The behaviour of nine other complex cells was difficult to describe. Generally, they were unresponsive to gratings. When they could be made to respond to gratings, they gave phase-sensitive responses like those of simple cells.