Figure 1.

(A) Generalized version of the von Baumgarten and Thümler model for central compensation of an otolith asymmetry. g is the current g-level, k is the otolith asymmetry parameter (0 < k < 1), LCC, and RCC are the left and right compensation centers, respectively, and a and c are the amounts of additive neural compensation required for balance between the left and right sides (a, c ≥ 0). (B) Imbalance as a function of g-level for the von Baumgarten and Thümler model. The direction of imbalance experienced upon an initial change in g-level depends on whether the new g-level is hypo-g or hyper-g. (C) Proposed model for compensation of an inherent otolith asymmetry. r_L and r_R are the preponderance parameters (0 < r_L, r_R < 1) and L(g) and R(g) facilitate compensation in novel g-levels. (D) Possible curves for imbalance as a function of g-level, based on the relationships among model parameters, for the proposed model when R(g) = a + b(g)^ε. Note that (A) and (C) are simply model block diagrams and are not meant to represent neuro-anatomical pathways.