1)do an EMG and save the screenshots (at least on a Cadwell or Cardinal/Nicolet)
2) If you are a AANEM member, they have a bunch of lectures that are open source that are avail as pdf's.
This isn't necessarily a good teaching website, but you can view a number of waveforms through youtube... search "CRD",, "positive sharp waves" etc.... There is a private practice that some of these were taken from and they post some caldwell screens on their wehbsite. As far as I know none of these site get into much teaching about them...but you can view them.
