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- Blackouts or periods of confused memory
- Episodes of staring or unexplained periods of unresponsiveness
- Involuntary movement of arms and legs
- Fainting spells followed by incontinence or excessive fatigue
- Odd vocalization, distorted perceptions, episodic feelings of fear that cannot be explained
- Head dropping
- Sudden loss of muscle tone
- Episodes of rapid eye blinking or rolling upward
- Inappropriate movements of mouth or face accompanied by blank expression
- Aimless, dazed behavior, including walking or repetitive movements that seem inappropriate to environment
- Excitement in the child
- Disturbed or lost consciousness, lip-smacking, mumbling, wandering, picking at clothes, or automatic behavior repetition