<unk>  is usually characterized by quadriplegia (loss of limb function) and the inability to speak in otherwise cognitively intact individuals. Those with<unk>  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<unk>  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 from producing voluntary sounds, though the vocal cords themselves may not be paralysed.
Locked-in syndrome
Say–Meyer syndrome
Nicolau–Balus syndrome
Achard syndrome
Cole-Carpenter syndrome
Dorian Gray syndrome
Shapiro syndrome
Lamb-Shaffer syndrome