p324fig08.43 Attention can flow along the boundaries of one chopstick and enable it to win the orientation competition where the two chopsticks cross, thereby enabling bipole grouping and figure-ground mechanisms to separate them in depth within the form cortical stream.<BR>||  The ambiguous X-junction. motion system. Attention propagates along chopstick and enhances cell activations in one branch of a chopstick.  MT-MST directional motion grouping helps to bridge the ambiguous position.