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. 2013 Aug 30;8(8):e72693. doi: 10.1371/journal.pone.0072693

Figure 5. Brain blood flow volume lateralization changes for cued word generation and Acheulean tool-making.

Figure 5

Raw mean CBFV (cerebral blood flow volume) difference (ΔV) over time during the language and knapping tasks. Positive values indicate a left dominant blood flow lateralization; negative values indicate greater blood flow on the right. The upper line shows the language task; the lower line shows the stone knapping task. The shaded areas show the SEM (standard error of the mean) at each data point.