Long-latency feedback coordinates upper-limb and hand muscles during object manipulation tasks
(2016) eNeuro — Vol. 3, n° 1, p. 1-12 (2016)
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- Abstract
- (en) Suppose that someone bumps into your arm at a party while you are holding a glass of wine. Motion of the disturbed arm will engage rapid and goal-directed feedback responses in the upper-limb. Although such responses can rapidly counter the perturbation, it is also clearly desirable not to destabilize your grasp and/or spill the wine. Here we investigated how healthy humans maintain a stable grasp following perturbations by using a paradigm that requires spatial tuning of the motor response dependent on the location of a virtual target. Our results highlight a synchronized expression of target-directed feedback in shoulder and hand muscles occurring at ∼60 ms. Considering that conduction delays are longer for the more distal hand muscles, these results suggest that target-directed responses in hand muscles were initiated before those for the shoulder muscles. These results show that long-latency feedback can coordinate upper limb and hand muscles during object manipulation tasks.
- Affiliations
Louvain Bionics Center of Interdisciplinary Expertise
Citations
Crevecoeur, F., Thonnard, J.-L., Lefèvre, P., & Scott, S. (2016). Long-latency feedback coordinates upper-limb and hand muscles during object manipulation tasks. eNeuro, 3(1), 1-12. https://doi.org/10.1523/ENEURO.0129-15.2016 (Original work published 2016)