About three hours after he falls asleep, Bobby often sits up in bed screaming incoherently. His mother tries to awaken him, but with no success. The next morning, he remembers nothing. It appears that Bobby suffers from

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Bobby's symptoms are consistent with night terrors, which are characterized by sudden arousal from deep sleep, accompanied by screaming, sweating, and a racing heart. Individuals experiencing night terrors are difficult to awaken and usually have no memory of the episode the next day. Anarcolepsy typically involves excessive daytime sleepiness and sudden loss of muscle tone, while sleep spindles and sleep apnea do not involve screaming or sudden arousal from sleep.

About Three Hours After He Falls Asleep, Bobby Often Sits