Non-dominant hand movement facilitates the frontal N30 somatosensory evoked potential

BMC Neuroscience

Research Article

Wynn Legon¹  W Richard Staines¹  Jennifer K Dionne¹  Sean K Meehan¹ 

[1] Department of Kinesiology, University of Waterloo, 200 University Ave. West, N2L 3G1, Waterloo, Ontario, Canada;

关键词: Supplementary Motor Area;    Somatosensory Evoke Potential;    Median Nerve Stimulation;    Secondary Somatosensory Cortex;    Dominant Limb;   

DOI  :  10.1186/1471-2202-11-112

 received in 2010-04-12, accepted in 2010-09-07,  发布年份 2010

来源: Springer

【 摘 要 】

BackgroundPrevious literature has shown that the frontal N30 is increased during movement of the hand contralateral to median nerve stimulation. This finding was a result of non-dominant left hand movement in right-handed participants. It is unclear however if the effect depends upon non-dominant hand movement or if this is a generalized phenomenon across the upper-limbs. This study tests the effect of dominant and non-dominant hand movement upon contralateral frontal and parietal somatosensory evoked potentials (SEPs) and further tests if this relationship persists in left hand dominant participants. Median nerve SEPs were elicited from the wrist contralateral to movement in both right hand and left hand dominant participants alternating the movement hand in separate blocks. Participants were required to volitionally squeeze (~ 20% of a maximal voluntary contraction) a pressure-sensitive bulb every ~3 seconds with the hand contralateral to median nerve stimulation. SEPs were continuously collected during the task and individual traces were grouped into time bins relative to movement according to the timing of components of the Bereitschaftspotential. SEPs were then averaged and quantified from both FCZ and CP3/4 scalp electrode sites during both the squeeze task and at rest.ResultsThe N30 is facilitated during non-dominant hand movement in both right and left hand dominant individuals. There was no effect for dominant hand movement in either group.ConclusionsN30 amplitude increase may be a result of altered sensory gating from motor areas known to be specifically active during non-dominant hand movement.

【 授权许可】

Unknown   
© Legon et al; licensee BioMed Central Ltd. 2010. This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.