Original Research ARTICLE
Hypnotic state modulates sensorimotor beta rhythms during real movement and motor imagery
- 1Inria Nancy - Grand-Est research centre, France
- 2Hôpitaux Universitaires de Strasbourg, France
The hypnosis technique is currently used in the medical field and influences directly the patient's state of relaxation, perception of the body and its visual imagination. There is evidence to suggest that hypnosis state may help patients to better achieve the task of motor imagination, which is central in rehabilitation protocols after a stroke. However, the hypnosis technique could also alter the activity in motor cortex. To the best of our knowledge, the impact of hypnosis on the EEG signal during a movement or an imagined movement is poorly investigated. In particular, how event-related desynchronization (ERD) and event-related synchronization (ERS) patterns would be modulated for different motor tasks may provide a better understanding of the potential benefits of hypnosis for stroke rehabilitation. To investigate this purpose, we recorded EEG signals from 23 healthy volunteers who performed real movements and motor imageries in closed eye condition. Our results suggest that the state of hypnosis changes the sensorimotor beta rhythm during the ERD phase but maintains the ERS phase in the mu and beta frequency band suggesting a different activation of the motor cortex in the hypnotized state.
Keywords: Electroence phalography (EEG), Hypnosis, ERD / ERS, Motor Imagery, Stroke rehabilitaiton
Received: 10 Jul 2019;
Accepted: 01 Oct 2019.
Copyright: © 2019 Rimbert, Zaepffel, Riff, Adam and Bougrain. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Mx. Sébastien Rimbert, Inria Nancy - Grand-Est research centre, Villers-lès-Nancy, France, firstname.lastname@example.org