Last week i had an SSEP (somatosensory evoked potentials) because my legs have locked up on me several times and i have been unable to continue to walk. anyway i took the test and just got a call today that the test was unreadable both arms and legs. ive had numerous emg/ncs's and was not in the least nervous about doing the evoked potentials. so now they want me to do it again. anyone else done the evoked potentials? have any problems with backround noise on them?