Adaptive feedback control models of the vestibulocerebellum and spinocerebellum.
We extend the cerebellar learning model proposed by Kawato and Gomi (1992) to the case where a specific region of the cerebellum executes adaptive feedback control as well as feedforward control. The model is still based on the feedback-error-learning scheme. The proposed adaptive feedback control model is developed in detail as a specific neural circuit model for three different regions of the cerebellum and the learning of the corresponding representative movements: (i) the flocculus and adaptive modification of the vestibulo-ocular reflex and optokinetic eye-movement responses, (ii) the vermis and adaptive posture control, and (iii) the intermediate zones of the hemisphere and adaptive control of locomotion. As a representative example, simultaneous adaptation of the vestibulo-ocular reflex and the optokinetic eye-movement response was successfully simulated while the Purkinje cells receive copies of motor commands through recurrent neural connections as well as vestibular and retinal-slip parallel-fiber inputs.
Gomi
H
H
ATR Human Information Processing Research Laboratories, Kyoto, Japan.
Kawato
M
M
D000818:Animals; D001676:Biofeedback, Psychology; D002531:Cerebellum / Q000502:physiology*; D006801:Humans; D008433:Mathematics; D008959:Models, Neurological; D008960:Models, Psychological; D009043:Motor Activity; D017120:Nystagmus, Optokinetic; D011689:Purkinje Cells / Q000502:physiology; D012027:Reflex, Vestibulo-Ocular; D013116:Spinal Cord / Q000502:physiology*; D014722:Vestibule, Labyrinth / Q000502:physiology*