One of my neighbours has MND. From what he has told me the early signs were weaknesses in his leg and hand muscles. He was diagnosed 10 years ago - there has been some progression but he still leads a fairly active life. Probably this reflects the fact that there are many different kinds of MND.
Electromyography and nerve conduction velocity studies often form part of the diagnosis.
You might find the information in this link helpful in discussing things with your health care team;
http://www.ninds.nih.gov/disorders/m...n_diseases.htm.
All the best.