Sentence:  The Mecholyl and noradrenalin tests applied with certain precautions are reliable indicators of this central <WSD>autonomic</WSD> balance , but for the sake of correlating autonomic and clinical states , and of studying the effect of certain therapeutic procedures on central autonomic reactions , additional tests seem to be desirable . 
Meaning of the word marked with <WSD> tags:  relating to or controlled by the autonomic nervous system