Was this peripheral neuropathy?
You know, I'm not sure, but believe so. I just read there is another one, but that one involves just one never (if I read that correctly) so since that doesn't seem to be the case I believe it is peripheral. Didn't want to call it that unless I knew for sure one way or the other.
your husband is deficient in magnesium. get mag glycinate or malate and have him build up to 800 mg or so per day. ALL the twitching will go away as will/should the neuropathy.