@FLClover .... a neurophysiologist is a neurologist who specializes in the diagnosis of nervous system disorders (not necessarily a surgeon.) They are supposed to give you nerve tests and advise yay or nay to surgery! He only confused you!
It really Sounds to me like you need to see An orthopedic hand specialist who has specific expertise in orthopedics as it relates to injuries and debilitating issues in the hand – which is what makes this type of medical specialist the proper health care professional to diagnose and treat your carpal tunnel syndrome!
Try and see the best ortho Hand specialist you can find .... and good luck