Mathie - this is a useful site. You can explore CT, ulnar nerve probs etc. The Q&A are nteresting as well.
http://www.teleemg.com/new/cts_and_ulnar1.htm

Here's a YouTube on testing for CT - Phalen's & Tenel's refers. Plus shows exercises - though I have not checked out the exercises.
http://www.youtube.com/watch?v=xuCjuLOSFK8


MollyC1i - Riding OutAS