Wednesday's MEDICINE BALL CARAVAN on KRVS (11am-noon Central Standard on 88.7FM locally or krvs.org) pulls healing powers from sources like JD McPherson, New York Dolls, Lane Mack, Sweet Cecilia, Raphael Saadiq, David Egan, Larry Williams, Lloyd Price, Creole String Beans, Mingus, Zappa and more.