You’re drifting gently off to sleep when, suddenly, a feeling of emptiness jolts you awake. This phenomenon, as disconcerting as it is common, raises many questions. Discover why your body suddenly seems to be playing tricks on you and what lies behind these nighttime awakenings.
You’re about to drift off to sleep when suddenly… a jolt shakes you, as if you were falling into an abyss. Rest assured, you’re not alone in experiencing this strange sensation. This phenomenon, far more common than you might think, is intriguing and can sometimes be alarming. But where exactly does it come from? Should you be worried? Let’s explore these mysteries of sleep.
Hypnic jerks: a more common phenomenon than you might think
These nocturnal jerks, which specialists call “hypnic jerks,” are sudden and involuntary muscle contractions that occur at the precise moment one falls asleep. They are often accompanied by a sensation of vertigo falling or a brief, disturbing dream.
What does this feeling feel like?
A sudden spasm that jolts you awake. A sensation of tumbling from a building, running down a flight of stairs, or falling out of bed. Sometimes, a brief auditory or visual hallucination accompanies the experience.
Did you know? Hiccups are also a form of myoclonic jerk, just like those famous hypnic jerks!
Why do these spasms occur?
Researchers have not yet unlocked all the secrets of these tremors, but several leads shed light on their origin.
A brain in full transition
When you fall asleep, your body naturally relaxes. But sometimes, the brain interprets this sudden relaxation as a danger signal. It then sends a nerve signal to the muscles… which triggers the infamous startle reflex.
A survival reflex inherited from our ancestors?
One evolutionary theory suggests that these tremors are a vestige of our ancestors who slept in trees. The brain would thus be checking our reflexes to prevent us from falling into the void.
Factors that amplify these spasms
Certain factors can contribute to the occurrence of these nighttime tremors:
Stress and anxiety: an overactive mind continues to send signals to the body, even at rest. Caffeine and stimulants: they delay sleep onset and increase muscle tension. Late-night exercise: it keeps muscles awake and makes it harder to relax. Lack of sleep: a sleep debt makes falling asleep more abrupt and restless.
Should we be alarmed?
Good news! These spasms are harmless and affect 60 to 70% of people, regardless of age or sex. They are therefore not considered a sleep disorder.
When should you consult a doctor?
If these sudden movements are frequent and prevent you from sleeping. If other symptoms appear (cramps, pain, chronic fatigue). If you experience a feeling of paralysis or repeated hallucinations.
How can these nighttime shakings be soothed?
Adopt a calming routine: relaxation, meditation, reading… Avoid caffeine and screens before bed. Opt for a regular and sufficient sleep schedule. Exercise during the day, but avoid intense workouts in the evening.
Have you ever experienced that strange sensation of falling while falling asleep? Feel free to share your experience!
