Really? According to most of the websites I have looked at, like https://www.webmd.com/brain/paresthesia-facts, parasthesia is caused by nerve compression, not arterial compression, most mention this as a common misconception. Ig that was the accepted consensus 6 years ago. Thanks for mentioning Saturday night palsy, I didn't know about that. I also wasn't aware of the difference in thickness, that explains a lot. +1.