Force-stabilizing synergies can be retained by coordinating sensory-blocked and sensory-intact digits


Autoři: Wei Zhang aff001;  Sasha Reschechtko aff002;  Barry Hahn aff003;  Cynthia Benson aff003;  Elias Youssef aff003
Působiště autorů: Department of Physical Therapy, City University of New York / College of Staten Island, Staten Island, New York, United States of America aff001;  Department of Physiology and Pharmacology, University of Western Ontario, London, Ontario, Canada aff002;  Emergency Medicine, Staten Island University Hospital, Staten Island, New York, United States of America aff003
Vyšlo v časopise: PLoS ONE 14(12)
Kategorie: Research Article
doi: 10.1371/journal.pone.0226596

Souhrn

The present study examined the effects of selective digital deafferentation on the multi-finger synergies as a function of total force requirement and the number of digits involved in isometric pressing. 12 healthy adults participated in maximal and sub-maximal isometric pressing tasks with or without digital anesthesia to selective digits from the right hand. Our results indicate that selective anesthesia paradigm induces changes in both anesthetized (local) and non-anesthetized (non-local) digits’ performance, including: (1) decreased maximal force abilities in both local and non-local digits; (2) reduced force share during multi-finger tasks from non-local but not local digits; (3) decreased force error-making; and (4) marginally increased motor synergies. These results reinforce the contribution of somatosensory feedback in the process of maximal voluntary contraction force, motor performance, and indicate that somatosensation may play a role in optimizing secondary goals during isometric force production rather than ensuring task performance.

Klíčová slova:

Anesthesia – Central nervous system – Fingers – Motor system – Sensory perception – Synergy testing – Vision


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2019 Číslo 12