From: Mechanisms of human cerebellar dysmetria: experimental evidence and current conceptual bases
Theory | Assumptions | Selected referenceq |
---|---|---|
Adaptative filter hypothesis | Based upon Marr-Albus theory. Transformation of sets of signals into others. Components are weighted individually and then recombined to minimise the errors in performance caused by unavoidable noise. | Fujita, 1982 [71] |
Internal models | The cerebellum contains neural representations to emulate movement. Internal models reproduce the dynamic properties of body parts. | Wolpert et al., 1998 [72] |
Forward model | The model predicts the next state given the current state and the motor command. | Â |
Inverse model | The model inverts the system by providing the motor command that will cause the desired change in state. | Â |
Tonic reinforcer | The cerebellum tunes the intensities of agonist/antagonist/synergist muscles. Cerebellum exerts an excitatory influence upon extra-cerebellar targets. | Eccles et al., 1967 [73] Bastian and Thach, 2002 [25] |
Cerebellar timer | Cerebellum is the main site of temporal representation of action. | Braitenberg, 1967 [74] Ivry and Spencer, 2004 [75] |
Wave-variable processor | The cerebellum contributes to a servo-motor mechanism. | Massaquoi and Slotine, 1996 [76] |
Sensory processor | The cerebellum monitors and adjusts the acquisition of sensory information. | Bower, 1997 [77] |