Thursday's MEDICINE BALL CARAVAN presents a psych-tinged hour of sound featuring the latest by Ray Lamontagne, Brass Bed, The Claypool Lennon Delirium, The Amazing Nuns, The Monkees and Allah-Las. Also: vintage tracks from The Rolling Stones, The Human Beinz, Velvet Underground, The Chymes, The Castaways, The Association and Quicksilver Messenger Service.