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Current\u2010source density (CSD) and multiunit activity (MUA) were recorded while viewing initially stationary random dot patterns that either moved incoherently or dilated from the central fixation. Onset of visual motion evoked large MUA\/CSD activity, with coherent motion evoking earlier and faster\u2010rising MUA\/CSD activity than incoherent, in both superficial and deep pyramidal layers. The selective response, peaking at \u2248115 ms, was especially large in deep pyramids, providing evidence that information necessary for visual flow calculations is projected from MT+ at an early latency to distant structures. The early onset of differential MUA\/CSD implies that the selectivity of this area does not depend on recurrent inhibition or other intrinsic circuitry to detect coherent motion. The initially greater increase of MUA to coherent stimuli was followed by a greater decrease beginning at \u2248133 ms, apparently because of recurrent inhibition. This resulted in the total MUA being greater to incoherent than coherent stimuli, whereas total rectified CSD was overall greater to coherent than to incoherent stimuli. However, MUA distinguished stationary from moving stimuli more strongly than did CSD. Thus, while estimates of total cell firing (MUA), and of total synaptic activity (CSD) generally correspond to previously reported BOLD results, they may differ in important details. Hum. 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