Sleep talking/bashing things in my sleep?

i sleep talk alot! and i move around in my sleep that much that i actually injure myself, in my sleep i have also punched and kicked my mother and almost strangled her! anything or anyone sleeping anywhere near me usually gets punched or something, and sleep-talking is just embarrassing. im 16, and i love sleep-overs and all, but because of this i dont sleep over peoples houses much anymore coz its so embarrassing. ive woken up with bruises and scratches from during the night, and i wear jackets all the time to just hide the bruises and all, but im just wondering if theres any way to stop sleep-talking and pretty much bashing myself up during the night? i also throw stuff, hit everything near me and throw my blankets and all.....so is there any way to stop it?? is it just psychological??