'I'm a doctor and this is why you feel like you're falling as you go to sleep'

A phenomenon known as hypnic jerks, where individuals experience a sudden jolt or feeling of falling just as they are drifting off to sleep, affects approximately 70 percent of the population. This occurrence, while commonly unsettling, is entirely benign and has been explained by Dr. Amir Khan, a well-known physician who frequently appears on British television programs such as ITV's Good Morning Britain and Lorraine. In a recent TikTok video, Dr. Khan detailed the scientific basis behind these startling sensations. Hypnic jerks typically occur during the transition phase between wakefulness and sleep, known as the first stage of light sleep. During this period, the body begins to relax, and the brain may misinterpret this relaxation as a sign of falling. As a result, the brain sends signals to the muscles to contract abruptly, causing the individual to jerk awake. According to Dr. Khan, this reaction could be linked to an evolutionary survival mechanism, reminiscent of early humans sleeping in trees, where a sudden twitch might have prevented actual falls. The Sleep Charity notes that hypnic jerks are characterized by an involuntary twitch that usually takes place just before falling asleep. These twitches can involve the entire body or specific parts, such as the legs, and are often accompanied by the perception of falling, a loud noise, or a flash of light. While these occurrences are generally not distressing and do not significantly impact long-term sleep quality, they can be influenced by several factors, including caffeine intake, other stimulants like alcohol, stress levels, physical activity near bedtime, and underlying sleep disorders such as sleep apnoea. The Sleep Foundation suggests that although the exact cause of hypnic jerks remains unclear, researchers believe they originate from the same region of the brain responsible for the startle response. A potential explanation involves a miscommunication within the reticular brainstem, leading to an unexpected reaction when muscles fully relax during the onset of sleep. Additionally, some theories propose that hypnic jerks might be a physical response to the dream-like imagery that often accompanies them. To mitigate the frequency of hypnic jerks, experts recommend maintaining consistent sleep schedules, ensuring the bedroom temperature is between 18 and 20 degrees Celsius, keeping the environment dark and quiet, avoiding electronic devices at least an hour before bedtime, reducing stress through activities like yoga, meditation, reading, or taking baths, and engaging in regular exercise, preferably not too close to bedtime. While hypnic jerks are generally considered harmless, individuals experiencing frequent episodes along with symptoms such as physical injuries, bedwetting, or confusion upon waking should consult their general practitioner. Otherwise, practicing good sleep hygiene is advised to promote better overall sleep health. Dr. Khan reassured his audience that encountering a hypnic jerk is a normal and harmless experience, urging them not to panic if it occurs. He emphasized that these moments reflect the brain's unique and sometimes quirky nature, providing a reminder that our bodies continue to adapt and respond to our environments in complex ways.