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We studied 25 patients within 6 hours of acute spinal cord injury using magnetically evoked cortical motor evoked potentials(MEPs).The subjects included 16 quadriplegics with cervical spine injuries and eight paraplegics.MEPs were recorded from abductor digiti minimi(ADM),biceps, flexor hallucis brevis,and tibialis anterior muscles on each side using appropriate directions of coil current.MEP's were not obtained,either at rest or during attempted voluntary contraction,in patients without preceding clinical evidence of voluntary activation.We conclude that in acutely injured spinal cord patients,magnetically evoked MEPs do not provide useful information regarding the likelihood of motor recovery. |
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evoked potentials
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