For example, a rebound phenomenon occurs when the sudden discontinuation of medication results in the relapse of symptoms that are worse than those before the treatment . Thus, treatments capable of causing rebound effects have to be withdrawn gradually. Another example is the posthypoglycemic hyperglycemia characterized by a rebound hyperglycemia after a period of hypoglycemia . When the blood glucose level is low the body tends to compensate by producing regulatory hormones that incite the liver to produce glucose from stored glycogen. Thus, the outcome is an increase of blood glucose or hyperglycemia . Another is the Stewart-Holmes sign seen in individuals with cerebellar deficit or a lesion in the cerebellum .