<Tr> <Td_colspan="2"> Locked - in syndrome can be caused by stroke at the level of the basilar artery denying blood to the pons, among other causes . </Td> </Tr> <Tr> <Th> Specialty </Th> <Td> Neurology, Psychiatry </Td> </Tr> <P> Locked - in syndrome (LIS), also known as pseudocoma, is a condition in which a patient is aware but cannot move or communicate verbally due to complete paralysis of nearly all voluntary muscles in the body except for vertical eye movements and blinking . The individual is conscious and sufficiently intact cognitively to be able to communicate with eye movements . The EEG is normal in locked - in syndrome . Total locked - in syndrome, or completely locked - in state (CLIS), is a version of locked - in syndrome wherein the eyes are paralyzed as well . Fred Plum and Jerome Posner coined the term for this disorder in 1966 . </P> <P> Locked - in syndrome usually results from quadriplegia and the inability to speak in otherwise cognitively intact individuals . Those with locked - in syndrome may be able to communicate with others through coded messages by blinking or moving their eyes, which are often not affected by the paralysis . The symptoms are similar to those of sleep paralysis . Patients who have locked - in syndrome are conscious and aware, with no loss of cognitive function . They can sometimes retain proprioception and sensation throughout their bodies . Some patients may have the ability to move certain facial muscles, and most often some or all of the extraocular muscles . Individuals with the syndrome lack coordination between breathing and voice . This prevents them producing voluntary sounds, though the vocal cords are not paralysed . </P>

What condition results in a patient being aware but unable to move