Sentence:  The Mecholyl and noradrenalin tests applied with certain precautions are reliable indicators of this central autonomic balance , but for the sake of correlating autonomic and clinical states , and of studying the <WSD>effect</WSD> of certain therapeutic procedures on central autonomic reactions , additional tests seem to be desirable . 
Meaning of the word marked with <WSD> tags:  a phenomenon that follows and is caused by some previous phenomenon