Dissociation of early SEP components in unilateral traumatic section of the lower medulla.
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.
D000328:Adult; D004558:Electric Stimulation; D005073:Evoked Potentials, Somatosensory; D006801:Humans; D008297:Male; D008475:Median Nerve / Q000503:physiopathology; D008526:Medulla Oblongata / Q000000981:diagnostic imaging / Q000293:injuries* / Q000503:physiopathology; D014056:Tomography, X-Ray; D014057:Tomography, X-Ray Computed