Heat map representation of unsupervised hierarchical clustering. Data are arranged in metabolites (rows) by sample type (columns). Metabolite family description: A, carnitine metabolism; B, eicosanoids; C, essential fatty acids and free fatty acids; D, glycerolipids; E, inositol metabolism; F, ketone bodies; G, long chain fatty acids; H, lysolipids; I, medium chain fatty acids; J, monoacylglycerols; K, sphingolipids; L, sterols and steroids. Green and red colors represent metabolite decreases and increases, respectively, relative to the median metabolite levels. See color scale. PUFA=polyunsaturated fatty acids; SCI=spinal cord injury. Color image is available online at www.liebertpub.com/neu