Neuromagnetic fields preceding unilateral movements in dextrals and sinistrals

Neuroreport
M TaniguchiT Hayakawa

Abstract

Movement-related magnetic fields were recorded with a whole-head magnetoencephalographic system in three dextrals and three sinistrals during right or left index finger extension. The motor field (MF) demonstrated an asymmetrical isofield map pattern with larger field reversal over the contralateral hemisphere for dominant hand movement and an almost symmetrical pattern for non-dominant hand movement in each subject. The equivalent current dipole moment of the MF for the contralateral hemisphere was significantly larger than the ipsilateral hemisphere for dominant hand movement, and almost equal for both hemispheres for non-dominant hand movement. These results were congruent for both dextrals and sinistrals, suggesting a more important role of the hemisphere contralateral to the dominant hand in unilateral voluntary movement, regardless of handedness.

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Citations

Feb 14, 2002·Neuroscience Letters·Masayuki HirataToshiki Yoshimine
Mar 24, 2000·Brain Research. Cognitive Brain Research·A GunjiM Hoshiyama
Apr 25, 2007·Laterality·Alexandra Lenhard, Joachim Hoffmann
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Jun 26, 2004·Journal of Dental Research·Y ShibukawaY Nakamura

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