Table 4.
Summary of PT Grey Matter Volumetric Asymmetries in Chimpanzees and Humans
| %L | %A | %R | N | %Difference | |
|---|---|---|---|---|---|
| Chimpanzees | |||||
| This study, 3.0T | 67 | 10 | 23 | 48 | 5.2 |
| This study, 1.5T | 76 | 9 | 15 | 34 | 10.4 |
| This study, Cadaver | 61 | 17 | 22 | 21 | 2.1 |
| Average | 69 | 11 | 20 | 103 | 6.5 |
| Humans | |||||
| Knaus et al. [72] | 71 | 4 | 25 | 48 | NP |
| Kasai et al. [73] | NP | NP | NP | 22 | 13.5 |
| Knaus et al. [27] | NP | NP | NP | 24 | 10.6 |
| Hirayasu et al. [74] | NP | NP | NP | 22 | 12.1 |
| Barta et al. [75] | NP | NP | NP | 32 | −2.4 |
| Kwon et al. [76] | NP | NP | NP | 16 | 16.1 |
| Frangou et al. [77] | NP | NP | NP | 39 | 7.9 |
| Frangou et al. [78] | NP | NP | NP | 17 | 3.4 |
| McCarley et al. [79] | NP | NP | NP | 18 | 14.6 |
| Average | 190 | 9.7 |
NP = data not provided. %L = percent left-biased, %A = percent with no bias, %R = percent right-biased. N = sample size; % Difference = percentage difference in the PT grey matter volume of the right and left hemispheres. Positive values indicate left hemisphere bias and negative values indicate right side bias.