2587633
doi
10.5281/zenodo.2587633
oai:zenodo.org:2587633
Maximilian Davide Broda
Experimental Psychology, Justus-Liebig University Giessen
Katja Fiehler
Experimental Psychology, Justus-Liebig University Giessen
Anticipatory grasping control modulates somatosensory perception
Dimitris Voudouris
Experimental Psychology, Justus-Liebig University Giessen
info:eu-repo/semantics/openAccess
Creative Commons Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/legalcode
<p>Somatosensory perception is hampered on the moving limb during a goal-directed movement. This somatosensory suppression is mostly attributed to a forward model that predicts future states of the system based on the established motor command. Here, we examined whether and how this suppression is modulated by the predictability of object features important for controlling a grasping movement. Participants reached-to-grasp an object between thumb and index finger and then lifted it as straight as possible. Objects with symmetric or asymmetric mass distributions were presented either in a blocked or random manner, so that the object’s mass distribution could be anticipated or not. At the moment of object contact, a brief vibrotactile stimulus of varying intensities was presented on the dorsal part of the moving index finger. Participants had to report whether they detected the stimulus. When the object’s mass distribution was predictable, contact points with the object were modulated to the object’s centre of mass. This modulation contributed to a minimized resultant object roll during lifting. When the object’s mass distribution was unpredictable, participants chose a default grasping configuration, resulting in greater object roll for asymmetric mass distributions. Somatosensory perception was hampered when grasping both types of objects compared to baseline (no-movement). Importantly, somatosensory suppression was stronger when participants could predict the object’s mass distribution. We suggest that the strength of somatosensory suppression depends on the predictability of movement-relevant object features.</p>
Zenodo
2019-02-24
info:eu-repo/semantics/article
2587632
1579526005.376263
217434966
md5:264e53ffdef36cc2e4e567a44a6d7b65
https://zenodo.org/records/2587633/files/Data.zip
public
10.5281/zenodo.2587632
isVersionOf
doi