Title : A Motion Direction Map in Macaque V 2 Running Title : A Direction map in V 2

Acknowledgements: We thank Dr. Robert Friedman for technical assistance. SUMMARY In mammals, the perception of motion starts with direction-selective neurons in the visual cortex. Despite numerous studies in monkey V1 and V2 (primary and second visual cortex), there has been no evidence of direction maps in these areas. In the present study, we used optical imaging methods to study the organization of motion response in Macaque monkey V1 and V2. In contrast to the findings in other mammals (e.g. cats and ferrets), we found no direction maps in macaque V1. Robust direction maps, however, were found in V2 thick/pale stripes and avoided thin stripes. In many cases direction maps were located within thick stripes and exhibited pinwheel or linear organizations. The presence of motion maps in V2 points to a new found prominence of V2 in motion processing, either for contributing to motion perception in the dorsal pathway and/or for motion-cue dependent form perception in the ventral pathway.