Somatosensory Evoked Potentials (SEP) Intraoperative Monitoring during Cranial Vertebral Compression and Instability

Four patients suffering from advanced myelopathy with severe quadriparesis from mechanical compression of the cervical medullary neuro-axis and instability of the cranial vertebral junction underwent staged surgical decompression and osseous stabilization. These patients were in particular jeopardy for exacerbation of their neurologic impairment due to the anterior compression, posterior encroachment, and instability.