Do prism and other adaptation paradigms really measure the same processes?

Area of Science:

• Neuroscience
• Motor Control
• Cognitive Science

Background:

• Sensorimotor plasticity enables the nervous system to adapt to changing task demands.
• Prism adaptation, visuomotor rotations, and dynamical perturbations are common paradigms to study this plasticity.
• A central question is whether these diverse paradigms engage similar underlying neural processes.

Purpose of the Study:

• To compare different sensorimotor adaptation paradigms based on perturbation application, after-effects, and generalization.
• To investigate whether these paradigms involve similar or distinct neural processes.
• To classify adaptation processes based on context specificity and error attribution.

Main Methods:

• Comparative analysis of established sensorimotor adaptation paradigms (prism adaptation, visuomotor rotations, dynamical perturbations).
• Focus on generalization properties as a key indicator of underlying processes and the credit assignment problem.
• Classification of adaptation processes based on context specificity and attribution of errors.

Main Results:

• Generalization properties highlight the involvement of different processes in various adaptation paradigms.
• Context-independent processes are favored when errors are attributed to self-performance (e.g., prism, Coriolis effects).
• Context-dependent processes are more associated with errors attributed to external interfaces (e.g., visuomotor rotations, force fields).

Conclusions:

• The neural processes underlying sensorimotor plasticity are closely linked to the specific methodological conditions of each experimental paradigm.
• Error attribution (internal vs. external) plays a crucial role in determining whether adaptation processes are context-dependent or independent.
• Future research on sensorimotor plasticity should carefully consider paradigm-specific methodological aspects to accurately interpret findings.