Dissociation of early SEP components in unilateral traumatic section of the lower medulla

Authors

  • Dr F. Mauguière MD,

    Corresponding author
    1. EEG Department, Hôpital Neurologique, 59 blvd Pinel, 69394 Lyon Cèdex 3, France
    • EEG Department, Hôpital Neurologique, 59 blvd Pinel, 69394 Lyon Cèdex 3, France
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  • Prof J. Courjon MD,

    1. EEG Department, Faculté de Medecine Lyon Nord, Hôpital Neurologique, 59 blvd Pinel, 69394 Lyon Cèdex 3, France
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  • B. Schott MD

    1. EEG Department, Faculté de Medecine Lyon Nord, Hôpital Neurologique, 59 blvd Pinel, 69394 Lyon Cèdex 3, France
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Abstract

Spinal and scalp early SEPs were recorded, using a noncephalic reference electrode, in a patient with a traumatic cervicomedullary lesion causing unilateral loss of position sense. Cervical N11 and N13 and scalp-recorded far-field P14 SEPs were clearly dissociated following stimulation of the affected side. The findings suggest that the P14 component is generated above the foramen magnum, whereas the cervical N13 has a spinal generator.

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