Banyak orang dewasa sedih melihat orangtua mereka mengalami penurunan fungsi kognitif dan gejala demensia. Kini para ahli di Universitas Southern California mencoba memanfaatkan teknologi realitas maya, atau VR, untuk membantu mencegah atau menunda timbulnya penurunan kognitif. Berikut laporan Helmi Johannes dari VOA di Washington, DC.
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