It's probably happened to you at some point. You start drifting off to sleep and suddenly you jump wide awake. 

 

awake at night

 

Professor Gaby Badre is a sleep expert at The London Clinic and she explained what exactly our body is doing when we jump out of our skin at night.

One of the main causes of jolting awake is stress, being very tired or having irregular sleep patterns that can disrupt the natural cycle of our bodies, says Professor Badre.

Jolting in our sleep is caused from experiencing vivid dreams, but our body isn't prepared because the muscles are not completely relaxed yet.

The condition is known as hypnic myoclonia and is described by Professor Badre as 'completely normal'.

To lower the chance of this happening to you, try and adopt a regular sleeping pattern and follow the tips of our very own sleep expert, Dr Nerina: /sleep-matters/dr-nerinas-sleep-toolkit/

 

Source:
http://www.mirror.co.uk/lifestyle/health/sometimes-jolt-were-drifting-sleep-6565847