Sentence:  Some investigators have found a parallelism between <WSD>remissions</WSD> and return of the sympathetic reactivity of the hypothalamus to the normal level as indicated by the Mecholyl test and , conversely , between clinical impairment and increasing deviation of this test from the norm . 
Meaning of the word marked with <WSD> tags:  an abatement in intensity or degree (as in the manifestations of a disease)