An attack is defined as a focal disturbance of function, lasting for more than 24 hours that does not have an alternative explanation. Pseudorelapses induced by fever or fatigue are not included*. The Prediction Score database requires that the attack produce continuous symptoms that reach nadir within days or a few weeks**.
Record the main symptoms from the most recent attack. Choose one or more of the indicated tracts. Do not record minor associated signs and symptoms. For instance, a parahypesthesia with hyperreflexia is recorded as sensory and not motor.
Complete remission is defined as the absence of constant residual symptoms in the appropriate functional system, ideally evaluated one year after the acute phase. The term complete remission includes intermittent residuals and minor signs such as a Babinski sign***.
* Vollmer T, Journal of the Neurological Sciences, 2007
** Runmarker and Andersen, Brain, 1993
*** Tedeholm et al, Multiple Sclerosis Journal 2013.