Most group disability insurance policies limit the duration of benefit payments for mental impairments. An interesting ruling out of Pennsylvania focuses on what constitutes a “mental impairment.” In Berkoben v. Aetna Life Insurance Co., 2014 U.S.Dist.LEXIS 39385 (W.D.Pa., Feb. 21), a magistrate judge’s report and recommendation, the court recommended overturning Aetna’s termination of benefits …