Pengaruh model environmental enrichment yang dikombinasi dengan latihan fisik aerobik terhadap fungsi memori spasial: kajian ekspresi synaptophysin, subunit GluR1 AMPAR, dan postsynaptic-95 = The effects of environmental enrichment model combined with aerobic physical exercise on spatial memory function study on the expression of synaptophysin ampar glur1 subunit and postsynaptic density 95