p339fig09.03 When an observer moves forward, an expanding optic flow is caused.  Eye rotations cause a translating flow.  When these flows are combined, a spiral flow is caused.  How do our brains compensate for eye rotations to compute the heading of the expanding optic flow?<BR>||  Optic flow during navigation (adapted from Warren, Hannon 1990) [observer, retinal flow]: [linear movement, expansion], [eye rotation, translation], [combined motion, spiral]