Fig. 9.

The vestibulocollic reflex (VCR) reduces oscillations during voluntary step displacements of the trunk (a) and of the head on a stationary trunk (b). In b, VCR with cancellation, VCR feedback is obtained by subtracting step motor command from actual head movement (see Fig. 6b). Suppression of head oscillations is almost as effective as happens with unmodified VCR. In these calculations, CCR was ignored. Curves are based on calculations from the Peng et al. (1996) model. Details as in Fig. 6 and “Appendix”