How is cubital tunnel syndrome diagnosed?

Cubital tunnel is diagnosed both from a patients' history, how often they tell you that it goes numb and tingly, and what fingers they complain. As well as the physical exam by a hand surgeon or even by a primary care physician. In addition, to confirm the diagnosis, often, the physician will refer a patient for an EMG, which is a nerve study that test how well the nerves work. And, in cubital tunnel's case, it tests how fast the nerve is working.