sentences:  During the 1950s and 1960s, the introduction of new drugs lessened the need for prolonged admission of patients.In addition, the Mental Health (Scotland) Act of 1960 also significantly altered legislation in respect of mental illness and reduced the grounds on which someone could be detained in a mental hospital.After the introduction of Care in the Community in the early 1980s, the hospital went into a period of decline and, once patients had been transferred to the Susan Carnegie Centre at Stracathro Hospital, Sunnyside Royal Hospital closed in December 2011.