GrandRounds The Corpus Callosum: It’s GRL Time! GruntDoc September 6, 2005 GRL means, in this case. Grand Rounds 50: The Corpus Callosum: It’s GRL Time!. No related posts. Continue Reading Previous Previous post: USATODAY.com – Reporter’s notebook: Treating those left behindNext Next post: Medical Insight from the Astrodome Related News Grand Rounds: February 14th, 2012–Valentine’s Day version February 14, 2012 MedBlog Grand Rounds: Year 8! September 28, 2011 2