CUED Publications database

How is somatosensory information used to adapt to changes in the mechanical environment?

Milner, TE and Hinder, MR and Franklin, DW (2007) How is somatosensory information used to adapt to changes in the mechanical environment? Prog Brain Res, 165. pp. 363-372. ISSN 0079-6123

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Abstract

Recent studies examining adaptation to unexpected changes in the mechanical environment highlight the use of position error in the adaptation process. However, force information is also available. In this chapter, we examine adaptation processes in three separate studies where the mechanical environment was changed intermittently. We compare the expected consequences of using position error and force information in the changes to motor commands following a change in the mechanical environment. In general, our results support the use of position error over force information and are consistent with current computational models of motor learning. However, in situations where the change in the mechanical environment eliminates position error the central nervous system does not necessarily respond as would be predicted by these models. We suggest that it is necessary to take into account the statistics of prior experience to account for our observations. Another deficiency in these models is the absence of a mechanism for modulating limb mechanical impedance during adaptation. We propose a relatively simple computational model based on reflex responses to perturbations which is capable of accounting for iterative changes in temporal patterns of muscle co-activation.

Item Type: Article
Uncontrolled Keywords: Adaptation, Physiological Adult Biomechanical Phenomena Electromyography Environment Feedback Female Humans Learning Male Models, Biological Movement Posture Proprioception Psychomotor Performance
Subjects: UNSPECIFIED
Divisions: Div F > Computational and Biological Learning
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:56
Last Modified: 27 Nov 2014 19:19
DOI: 10.1016/S0079-6123(06)65022-X