Table S1.
Definition of anatomical landmarks
| Landmark | Definition |
| 1 | Frontal pole |
| 2 | Occipital pole |
| 3 | Anterior end of the Sylvian fissure (defined on the pars orbitalis in humans) |
| 4 | Posterior end of the Sylvian fissure (following the main course of the fissure when the terminal segment is divided) |
| 5 | Anterior end of the superior temporal sulcus (close to the temporal pole) |
| 6 | Inflection point between the horizontal segment and the ascending segment of the superior temporal sulcus |
| 7 | Most posterior and superior point of the superior temporal sulcus (located between the supramarginal gyrus and the angular gyrus) |
| 8 | Inferior termination of the central sulcus |
| 9 | Superior termination of the central sulcus (intersection between the central sulcus and the midline) |
| 10 | In chimpanzees: intersection between the intraparietal sulcus and the lunate sulcus |
| In humans: intersection between the intraparietal sulcus and the transverse occipital sulcus | |
| 11 | In chimpanzees: intersection of the lunate sulcus with the midline |
| In humans: intersection of the parieto-occipital sulcus with the midline | |
| 12 | In chimpanzees: most inferior and lateral point of the lunate sulcus |
| In humans: occipital notch | |
| 13 | Intersection of the inferior frontal sulcus with the precentral sulcus |
| 14 | Inferior end of the precentral sulcus |
| 15 | In chimpanzees: superior end of the fronto-orbital sulcus |
| In humans: anterior end of the latero-orbital sulcus | |
| 16 | In chimpanzees: inferior end of the fronto-orbital sulcus |
| In humans: posterior end of the latero-orbital sulcus |