A friend of mine went in for an EMG today; she was looking for an explanation for why, over the last few weeks, she's been feeling some weakness in her left hand, particularly the third and fourth fingers. It hasn't been dramatic, but she noticed around Christmas that she was having some trouble gripping things with that hand, that it feels somewhat numb and weak, and that when exposed to cold the symptoms seemed to get worse, so that she had trouble unbuckling her seatbelt. She's about 50, by the way.

The EMG evidently wasn't promising; I don't know details but my friend said her neurologist immediately ruled out the thing we'd thought it might be via Google search, which was ulnar nerve entrapment, and said that, basically, two nerves in my friend's hand are dead and that it must have been coming on for a while and my friend just didn't notice. She also said the neurologist ruled out diabetic neuropathy because it usually presents on both sides simultaneously.

The neurologist, evidently, was frankly puzzled and said so. My friend felt she was leaning towards its being some sort of disease but she wasn't sure what. She's getting more tests on Friday to see what is happening in her feet, and then after that there will probably be more to try to nail down what's causing this.

So far my friend seems to be taking this calmly (though I know she's worried). I on the other hand am freaking out, because I was really hoping that it was the ulnar nerve thing because Google seems to think that the other likely option is ALS. It also says, however, that ALS mimics a whole bunch of other things (but is really quiet about what those might be) and that it often presents with other symptoms like twitching, speech impairment, difficulty swallowing, etc. So I'm sort of hopeful that it could be something less serious but I'm having trouble figuring out what we might be looking at here.

Anyone have any places I can look for resources on someone suffering from two inexplicably dead nerves in the left hand?