Table 2.
Statistics of the global SA and CT values for the human and chimpanzee brain showing 1) significant rightward SA, but not CT, asymmetry in the human brain and 2) no significant asymmetry for either SA or CT in the chimpanzee brain
| Human | Chimpanzee | ||||
|---|---|---|---|---|---|
| Hemisphere | SA (×1.0e+05 mm2) | CT (mm) | SA (×1.0e+04 mm2) | CT (mm) | |
| Left | 1.11 ± 0.11 | 2.29 ± 0.09 | 3.67 ± 0.29 | 1.39 ± 0.11 | |
| Right | 1.12 ± 0.11 | 2.30 ± 0.09 | 3.68 ± 0.29 | 1.40 ± 0.12 | |
| Asymmetry | t-stat | −3.82 | −1.10 | −0.39 | −1.31 |
| P-value (2-tailed) | < 0.001 | 0.27 | 0.70 | 0.19 | |