4 ms·
One hypothesis for the sudden contraction of muscles is that your brain is losing feeling of the bed supporting your body when going to sleep: https://en.wikipe
by rzzzt 7y ago
One hypothesis for the sudden contraction of muscles is that your brain is losing feeling of the bed supporting your body when going to sleep: https://en.wikipedia.org/wiki/Hypnic_jerk https://en.wikipedia.org/wiki/Hypnic_jerk
- saghm 7y agoWhen this happens to me, it always feels like I'm about to fall forward. The best I can describe it is as the feeling that I just took a step forward but instead of my foot finding the ground, the surface I was walking on ended (as if I stepped off a ledge or something).
- rzzzt 7y agoFor me it's the opposite: it feels like someone pushing me out of a tree swing or a chair that has no backrest (I'm sleeping on my side).