A neuromagnetic study of the functional organization of the sensorimotor cortex

Movement-related neuromagnetic fields from eight healthy human subjects were investigated in a Bereitschaftspotential paradigm. The three conditions studied were right-sided mouth, index finger and foot movement. The neuromagnetic field patterns corresponding to the motor field and the movement-evok...

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Bibliographic Details
Published inThe European journal of neuroscience Vol. 6; no. 4; p. 632
Main Authors Kristeva-Feige, R, Walter, H, Lütkenhöner, B, Hampson, S, Ross, B, Knorr, U, Steinmetz, H, Cheyne, D
Format Journal Article
LanguageEnglish
Published France 01.04.1994
Subjects
Adult
Brain Mapping
Electromyography
Evoked Potentials
Female
Fingers - innervation
Foot - innervation
Humans
Magnetic Resonance Imaging
Magnetoencephalography
Male
Models, Neurological
Motor Activity
Mouth - innervation
Movement
Somatosensory Cortex - anatomy & histology
Somatosensory Cortex - physiology
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Summary:Movement-related neuromagnetic fields from eight healthy human subjects were investigated in a Bereitschaftspotential paradigm. The three conditions studied were right-sided mouth, index finger and foot movement. The neuromagnetic field patterns corresponding to the motor field and the movement-evoked field I were analysed using a moving dipole model. For both components a somatotopic organization was found: the estimated dipole locations for the mouth were more lateral and those for the foot more medial than the estimated dipole positions for the index finger movement. With regard to possible clinical applications, e.g. non-invasive mapping of the sensorimotor cortex and studies of plasticity of the motor function, the present results suggest that the investigation of movement-evoked field I for the index finger condition is most likely to yield further results.
ISSN:0953-816X
DOI:10.1111/j.1460-9568.1994.tb00308.x