Fig. 12.

Schematic diagram summarizing the two main computations necessary to transform primary vestibular signals into inertial motion parameters. Angular velocity signals from the semicircular canals (ω) are used to segregate the resultant linear acceleration signals coded by primary otolith afferents (α) into gravitational (g, orientation) and translational (f) components. Gravitational estimates are also used to transform head-fixed angular velocity signals from the semicircular canals (ω) into inertial velocity, i.e., space-referenced angular velocity (ω_S) (Angelaki and Hess, 1994, 1995, 1996b).