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Pediatric Radiology

Erschienen in:

01.05.2003 | Original Article

Volumetric localization of somatosensory cortex in children using synthetic aperture magnetometry

verfasst von: Jing Xiang, Stephanie Holowka, Rohit Sharma, Amrita Hunjan, Hiroshi Otsubo, Sylvester Chuang

Erschienen in: Pediatric Radiology | Ausgabe 5/2003

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Abstract

Background

Magnetic signal from the human brain can be measured noninvasively by using magnetoencephalography (MEG).

Objective

This study was designed to localize and reconstruct the neuromagnetic activity in the somatosensory cortex in children

Materials and methods

Twenty children were studied using a 151-channel MEG system with electrical stimulation applied to median nerves. Data were analyzed using synthetic aperture magnetometry (SAM).

Results

A clear deflection (M1) was clearly identified in 18 children (90%, 18/20). Two frequency bands, 30–60 Hz and 60–120 Hz, were found to be related to somatosensory cortex. Magnetic activity was localized in the posterior bank of the central sulcus in 16 children. The extent of the reconstructed neuromagnetic activity of the left hemisphere was significantly larger than that of the right hemisphere (P<0.01).

Conclusion

Somatosensory cortex was accurately localized by using SAM. The extent of the reconstructed neuromagnetic activity suggested that the left hemisphere was the dominant side in the somatosensory system in children. We postulate that the volumetric characteristics of the reconstructed neuromagnetic activity are able to indicate the functionality of the brain.

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Titel: Volumetric localization of somatosensory cortex in children using synthetic aperture magnetometry
verfasst von: Jing Xiang
Stephanie Holowka
Rohit Sharma
Amrita Hunjan
Hiroshi Otsubo
Sylvester Chuang
Publikationsdatum: 01.05.2003
Verlag: Springer-Verlag
Erschienen in: Pediatric Radiology / Ausgabe 5/2003
Print ISSN: 0301-0449
Elektronische ISSN: 1432-1998
DOI: https://doi.org/10.1007/s00247-003-0883-z

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Springer Medizin

Volumetric localization of somatosensory cortex in children using synthetic aperture magnetometry

Abstract

Background

Objective

Materials and methods

Results

Conclusion

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Update Radiologie

Springer Medizin

Abstract

Background

Objective

Materials and methods

Results

Conclusion

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