What is to twitch; to cause to twitch convulsively. Convulsions, arising from something vellicating a nerve in its extremity, are not very dangerous. Arbuthnot called?

vellicate — To twitch; to cause to twitch convulsively. Convulsions, arising from something vellicating a nerve in its extremity, are not very dangerous. Arbuthnot. (Webster's 1913.)

Sources