mental stimulation. He may also be having trouble adjusting to the new situation and may be depressed, or confused.
Medicare only pays for physical therapy for a certain period - say one month; then the patient is assessed to see if more improvement is to be expected; if not, therapy is discontinued.
A nursing home should have activities available to residents daily.
The presence of family and friends is all important to a nursing home resident, in order to support the resident, but also to exhibit to the nursing home that someone/family/ friends are interested in seeing that the resident is given proper and sufficient care. Usually the nursing home welcomes visitors. Perhaps sharing a meal with him would be a good way to spend time with him.
My spouse was in a nursing home because of a neurological condition for six years, until his death. It was difficult for him; he never wanted to be there, but the conditional was such that he would not have lived without the care and routine he had there. Family visited every day, mostly at mealtime.