Final answer:
REM Sleep Behavior Disorder (RBD) is the disorder that fits the given descriptions.
Step-by-step explanation:
The disorder that fits the given descriptions is REM Sleep Behavior Disorder (RBD). RBD occurs when the muscle paralysis associated with the REM sleep phase does not occur. It is characterized by high levels of physical activity during REM sleep, especially during disturbing dreams. RBD usually occurs with another sleep disorder and can lead to injuries to the individual or their sleeping partners.