関連ワード:
why does your body jerk when you're falling asleep why does your body jolt when you re falling asleep why does your body jump when you re falling asleep why does the body jerk when you re falling asleep why does your body twitch when you re falling asleep why does your body shake when you're falling asleep why does your body jerk awake when you're falling asleep why does your body twitch when you are falling asleep why does your body jerk when you re trying to fall asleep why does your body jerk while you're falling asleep
