Why do people sometimes spasm/jump when they are just falling off to sleep?!
Question: Why does it not happen all the time when a person is about to sleep?
Answers: Why does it not happen all the time when a person is about to sleep?
This falling sensation, together with a body movement known as a "sleep start," is what doctors and scientists call a hypnic or myoclonic (say: my-eh-kla-nik) jerk, and it usually happens right before going into deeper stages of sleep.
Here's why doctors think the falling feeling and myoclonic jerks happen. When you fall asleep, normally your body temperature goes down and your heart starts to beat just a little slower. This is because your brain signals your body to relax to prepare for sleep. When your muscles are relaxed, you go into the very first stages of sleep, but you're not sleeping too deeply yet.
This brain activity may cause your larger muscles to contract a little bit. In response, another part of your brain will make up a very quick mini-dream to go along with what is happening. You might think this would take a while, but your brain works so lightning fast that it makes up the story almost at the same instant that your muscles jerk.
During this light sleep, you can be easily awakened - like if the phone rings or if your dog licks your face. A lot of people who do wake up during this light sleep believe they haven't really fallen asleep yet. That's why you may think that your body jerked right before you were about to fall asleep, but really, you were lightly asleep the whole time - just not deeply asleep.
Myoclonic jerks are a normal part of sleep. Most people (80%) have them at one time or another. But many people do not realize their muscles are jerking at times during light sleep and it doesn't wake them up.
Try watching someone who is in the early stages of sleep. If he's twitching a little bit, it means he's experiencing a myoclonic jerk but isn't being startled awake.
drugs its da drugs mon
Your brain relaxes, and begins to enter a sleep state. Sometimes synapses that are still "hot" will fire and trigger "spasms" because your brain isn't....."paying attention." That's the best analogy I can think of.
usually it is because there is some part of them "surprised" by the other part falling asleep. the most common example is "nodding off" where a seated person falls asleep, but their head slumps down and when it hits their neck or shoulder, they wake up, but only enough to raise their head, and the process repeats a few times before they get used to the idea that their head is going to be in a funny position for a while.
I've done this when I have had a dream that I'm falling and it has happened when I've just dozed off and thought that I was slipping off bed, sofa, chair or where ever I had fallen asleep. (It's nothing drug related.)
i do it all the time, its so anoying and i donno why. aswell it hapans during dreams and wakes me up. its like youre whole body gets an electric shock and you jump.