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  Cortical neuromagnetic fields evoked by voluntary and passive hand movements in healthy adults

Woldag, H., Waldmann, G., Schubert, M., Oertel, U., Maess, B., Friederici, A. D., et al. (2003). Cortical neuromagnetic fields evoked by voluntary and passive hand movements in healthy adults. Journal of Clinical Neurophysiology, 20(2), 94-101. doi:10.1097/00004691-200304000-00002.

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Woldag, H., Author
Waldmann, Guido, Author
Schubert, M., Author
Oertel, U., Author
Maess, Burkhard1, Author              
Friederici, Angela D.1, Author              
Hummelsheim, H., Author
Affiliations:
1MPI of Cognitive Neuroscience (Leipzig, -2003), The Prior Institutes, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634574              

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 Abstract: Neuromagnetic fields were recorded from the left cerebral hemisphere of six healthy right-handed subjects under three different conditions: (1) externally triggered rapid voluntary extension and flexion of the right hand, (2) passive extension and flexion of the right hand, and (3) stimulation of the skin of the right index finger by means of air pressure. Location analysis using the current density analysis did not reveal any differences between motor evoked field I (MEF I) in active and passive movements, and met the maximum of cerebral activation in the contralateral precentral region. In contrast, the sensory evoked field was located clearly in the contralateral postcentral region. Additionally, a significantly shorter latency of MEF I (with respect to movement onset) was observed in flexion compared with extension in both passive and active movements. These results support the assumption that MEF I is generated by cortical activation resulting from proprioceptive, probably muscle spindle, input. The current density analysis has proved to be an appropriate method for investigating movement-related fields. Furthermore, the described method seems to be appropriate for evaluating the processes of cortical reorganization and the influence of neurorehabilitation within longitudinal studies in patients with lesions in motor centers of the brain.

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Language(s): eng - English
 Dates: 2003
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: eDoc: 239492
Other: P6937
DOI: 10.1097/00004691-200304000-00002
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Title: Journal of Clinical Neurophysiology
  Other : J. Clin. Neurophysiol.
Source Genre: Journal
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Publ. Info: New York, N.Y. : Raven Press
Pages: - Volume / Issue: 20 (2) Sequence Number: - Start / End Page: 94 - 101 Identifier: ISSN: 0736-0258
CoNE: https://pure.mpg.de/cone/journals/resource/954925536099