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In their classic book Plum and Posner1 used the term locked in syndrome for patients who had an injury (eg, stroke) to the brainstem that induced quadriplegia as well as a bulbar and pseudobulbar paralysis of the cranial nerves, but sparing the oculomotor nerve. Patients with this disorder can be alert, aware of some forms of stimuli, and can communicate by using vertical eye movements and blinking. Thus, these patients actually have a partial locked-in syndrome.
Heilman KM. Locked-In or Locked-Out, But Present. JAMA Neurol. 2013;70(10):1229-1230. doi:10.1001/jamaneurol.2013.3694