PROGRESS TOWARD A MULTIPLE INPUT MODEL OF THE VESTIBULO-OCULAR REFLEX.

Preliminary results of a multiple-input model to describe the vestibulo-occular reflex (VOR) during low-frequency (0. 01 to 0. 08 Hz) sinusoidal pitch in cats are reported. A weighted sum of sinusoidal angular velocity and two jerk functions derived from the changing orientation of the animals with respect to gravity fits the major aspects of the experimental data. This indicates that the brain derives eye movement commands from a linear combination of these inputs. Several questions remain before the model can be finalized, but it provides the most complete description to date of the VOR during sinusoidal pitch.