Fig. 2. Average coherence (± s.e.m.) of sideward angular velocity (solid line) and yaw velocity (broken line) with the subtracted responses of right and left horizontal system equatorial neuron (HSE) (N=4), intersaccadic parts of stimulus and response only. Responses to optic flow based on head orientation (A) or body yaw (B). Sideward is perpendicular to the head's plane of symmetry. Behavioural data used for reconstruction of visual stimuli are based on two flights originating from different flies.