Mechanisms of sensorimotor adaptation in a hierarchical state feedback control model of speech
Fig 5
Auditory prediction and articulatory state feedback control law.
Left: Simulations with auditory prediction fixed to its baseline value. The output showed a greater adaptation response compared to the default simulation where the auditory prediction was allowed to vary. Right: Using updated Jacobian (task-to-articulatory) matrices in the articulatory state feedback control law resulted in similar adaptation behavior (blue solid line) to that of the default mode which updates only the articulatory-to-task transformation (scarlet dashed line). When “naïve” Jacobian matrices generated from the unadapted articulatory-to-task model were used in the articulatory state feedback control law instead (green shaded area), the adaptation behavior was still present. In contrast, when the adapted Jacobian matrix for the state feedback control law was used with the “naïve” articulatory-to-task transformation model, adaptation disappeared (gray shaded area).