ELECTROPHYSIOLOGY IN THE LOCKED-IN-SYNDROME

We investigated five patients with a locked-in-syndrome (LIS) and repo rted the clinical, electrophysiologic, neuroradiologic, and neuropatho logic findings. EEG reactivity was present in two and absent in three cases. Somatosensory evoked potentials (SEP) varied from unilaterally normal to bilaterally absent. We conclude that there is no specific pa ttern of SEP abnormality characteristic of LIS and that EEG reactivity cannot be taken as a sole measure of consciousness.