Continuous – Recording of muscles’ spontaneous activity. During surgery, EMG helps evaluate nerve/nerve root integrity. If nerve(s) are being irritated by the surgical procedure, EMG activity will be seen in the corresponding muscle(s).
Evoked (CMP) – Recorded from the muscles following direct stimulation of the corresponding nerves and nerve roots. CDI uses CMP to assist surgeons in identifying nerves in and around the area they are working on and to confirm proper screw placement in spinal fusions.