TRH and cerebellar ataxia: Recently, it has been shown that TRH analog treatment, using an intravenous injection of 2 mg of protirelin tartrate once daily for 14 days in 18 patients with SCD, improved clinically evaluated cerebellar ataxia (using the Scale for the Assessment and Rating of Ataxia [SARA]), which is a measure that reflects improved simple motor execution and lessened dysmetria by evaluating patients’ performance in a prism adaptation task.