Questions: Samek was driving to work when he suddenly felt paralyzed and couldn't resist falling asleep. Samek may have - damage to his K-complex - REM sleep behavior disorder (RBD) - narcolepsy - somnambulism

The answer is the third one: narcolepsy.

Explanation for each option:

1. Damage to his K-complex: K-complexes are brain waves that occur during non-REM sleep and are associated with sleep maintenance. Damage to K-complexes is not typically associated with sudden sleep attacks while awake.

2. REM sleep behavior disorder (RBD): RBD involves acting out dreams during REM sleep due to a lack of muscle atonia. It does not cause sudden sleep attacks while awake.

3. Narcolepsy: Narcolepsy is a sleep disorder characterized by excessive daytime sleepiness and sudden sleep attacks, which aligns with Samek's experience of suddenly feeling paralyzed and falling asleep.

4. Somnambulism: Somnambulism, or sleepwalking, occurs during non-REM sleep and involves walking or performing other activities while asleep. It does not cause sudden sleep attacks while awake.

In summary, Samek's symptoms are most consistent with narcolepsy, which involves sudden and uncontrollable episodes of falling asleep.