TY - CHAP M1 - Book, Section TI - Allan-Herndon Syndrome A1 - Bissonnette, Bruno A1 - Luginbuehl, Igor A1 - Marciniak, Bruno A1 - Dalens, Bernard J. Y1 - 2006 N1 - T2 - Syndromes: Rapid Recognition and Perioperative Implications AB - Although most neonates and infants with this disorder appear to develop normally in the first few months of life, the presence of poor muscle tone most often already is present at birth. By age 6 months, hypotonia, inability to hold up the head, and severe muscle atrophy are detectable. Severe mental retardation is associated with multiple congenital anomalies. SN - PB - The McGraw-Hill Companies CY - New York, NY Y2 - 2024/03/29 UR - accessanesthesiology.mhmedical.com/content.aspx?aid=58062223 ER -