Today is National Restless Leg Awareness Day, designated to promote familiarity with a relatively rare medical condition identified in 1945 by Swedish neurologist Karl-Axel Ekbom. (Sept. 23 is his birthday.) I’m Times art critic Christopher Knight, filling in on the Essential Arts Newsletter for columnist Carolina A. Miranda. Newsletter Your essential guide to the arts in L.A. Get Carolina A. Miranda's weekly newsletter for what's happening, plus openings, critics' picks and more. Enter email address Sign Me Up You may occasionally receive promotional content from the Los Angeles Times. At MoMA, “Ed Ruscha: Now Then” inspires reminiscence When I graduated...