Leg cramps can also be a symptom of the nervous system disorder multiple sclerosis. Some people with MS experience spasticity, which can include a range of involuntary muscle spasms and twitches, as well as leg cramps. Spasticity might feel like a mild tightness or tingling in the muscles to some people or more severe cramping and pain to others.
wrest definition: Wrest is to take something by force or with considerable difficulty. (verb) When your friend is holding very tightly onto the dollar bill in his hand and you grab and pull and tug it until you get it out of his hand and into yours...
Learner's definition of ASCERTAIN. [+ object] formal. : to learn or find out (something, such as information or the truth) They were unable to ascertain [=(more commonly) determine] the cause of the fire. The police are now attempting to ascertain his whereabouts. [=to find out where he is] Her doctors have been unable to ascertain [=find out] why she is ill. = Her doctors have been unable to ascertain the cause of her illness.