Are there any tests for these:
Vagus Never
Antonomic nervous system

to check if there is any damage or inflammation or anything? I was reading on the testing neurotransmitters in the blood/urine. Can this help? One of my docs said i could have an ANS dysfunction issue but he was a GI doctor and is not sure how to diagnose this.

I dont mind getting any test done but need to know what type of tests.
Thanks.