Pii: S0304-3940(00)01367-7

The pretectal nucleus lentiformis mesencephali (LM) receives direct input from the contralateral retina and is dedicated to the analysis of optic ̄ow®elds resulting from self-motion. The activity of 126 LM neurons in response to optic ̄ow stimuli was recorded. As with previous studies, it was found that most neurons (,90%) exhibited direction-selectivity to large-®eld stimuli moving in the contralateral hemi®eld. However, some neurons (,10%) responded to stimulation of both eyes and had receptive ®eld structures conducive for detection of particular patterns of optic ̄ow resulting from either self-translation or self-rotation. These binocular neurons were maximally responsive to panoramic optic ̄ow®elds simulating either translational or rotational optic ̄ow. q 2000 Elsevier Science Ireland Ltd. All rights reserved.