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. 2008 Jun;25(6):603–614. doi: 10.1089/neu.2007.0481

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Copyright 2008, Mary Ann Liebert, Inc.

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FIG. 4. — Full time-course plots of the trends in metabolic ratios of N-acetyl-aspartate to creatine (NAA/Cr; A), lactate to creatine (Lac/Cr; B), and N-acetyl-aspartate to lactate (NAA/Lac; C) in traumatic brain injury (TBI; solid lines) and sham (dashed lines) rats, with ipsilateral samples represented by closed marks and contralateral with open marks (*p < 0.05 TBI ipsilateral vs. contralateral). Both the Naa/Cr and Lac/Cr ratios were lower at 1 week than at 4 or 24 h in TBI ipsilateral samples (^πp < 0.05 1 week vs. 4 and 24 h). The NAA/Lac ratio was higher at 1 week than at 24 h in TBI ipsilateral samples (^δp < 0.05 1 week vs. 24 h).