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Post-movement beta synchronization in subjects presenting with sensory deafferentation

Authors :
Reyns, N.
Houdayer, E.
Bourriez, J.L.
Blond, S.
Derambure, P.
Source :
Clinical Neurophysiology. Jun2008, Vol. 119 Issue 6, p1335-1345. 11p.
Publication Year :
2008

Abstract

Abstract: Objective: We studied the time course and location of post-movement beta synchronization (PMBS) in patients presenting with sensory deafferentation, in order to assess the hypothetical relationship between the PMBS and the cortical processing of movement-related somatosensory afferent inputs. Methods: We used the event-related synchronization (ERS) method. EEG activity was recorded (via a 128-electrode system) during brisk, unilateral right and left index finger extension by 10 patients presenting with neuropathic pain related to sensory deafferentation. Intra- and post-movement changes in beta source power were calculated relative to pre-movement baseline activity. We compared the PMBS results for the painful and non-painful body sides. Furthermore, PMBS patterns in patients were compared with those in nine healthy volunteers. Results: PMBS pattern related to the painful side had a spatial distribution, with an ipsilateral preponderance, significantly more restricted than PMBS pattern on the non-painful side and in the control group. There were no significant differences between patient PMBS patterns on the non-painful side and those in the control group. Conclusions: Sensory deafferentation disrupts normal PMBS patterns. Significance: This work provides additional arguments to the hypothesis supporting that the PMBS is influenced by movement-related somatosensory input processing. [Copyright &y& Elsevier]

Details

Language :
English
ISSN :
13882457
Volume :
119
Issue :
6
Database :
Academic Search Index
Journal :
Clinical Neurophysiology
Publication Type :
Academic Journal
Accession number :
31925273
Full Text :
https://doi.org/10.1016/j.clinph.2008.02.020