On the interaction of otolithic and cupular sensations.

A differential equation is proposed for describing how the brain compromises between a sensation of rotation about a particular axis (derived from the semicircular canals) and a sensation of gravity perpendicular to this axis (derived from the otolith organs). It is shown that this differential equation, with suitably chosen and reasonable values of the parameters and initial conditions, will satisfactorily explain the experimental results of Lansberg, Guedry, and Graybiel (7).