1. (noun) an encephalitis that was epidemic between 1915 and 1926; symptoms include paralysis of the extrinsic eye muscle and extreme muscular weakness

• encephalitis lethargica
• lethargic encephalitis
• sleeping sickness
• sleepy sickness

1. (noun) an encephalitis that was epidemic between 1915 and 1926; symptoms include paralysis of the extrinsic eye muscle and extreme muscular weakness

• cephalitis
• encephalitis
• phrenitis