Fig. 4.

Parietal bulging in modern humans occurs in the early postnatal stage (a), while frontal and facial morphology undergo changes in successive ontogenetic steps (b). The spatial dissociation between cerebral and cranial elements can be the result of the early parietal growth. Alternatively, parietal bones and lobes can be more integrated during this stage, but the spatial association can be lost in the successive steps, after modification of the frontal and facial blocks (digital reconstructions after Neubauer, 2014).