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

FIG. 2.

FIG. 2.

Ipsilateral and contralateral hemispheric ratios of N-acetyl-aspartate to creatine (NAA/Cr) and lactate to creatine (Lac/Cr) at 4 h (A), 24 h (B), and 7 days (C) after traumatic brain injury (TBI). The Lac/Cr ratio was increased ipsilateral to injury at 4 h (A; *p < 0.05 vs. contralateral). At 24 h, the NAA/Cr ratio had decreased and Lac/Cr remained increased ipsilateral to injury (B; *p < 0.05 vs. contralateral). By 7 days, the ipsilateral NAA/Cr remained decreased (C; *p < 0.05 vs. contralateral).