“…The frontal bone encompasses two functionally different regions of the skull, the neurocranium and the upper face, which grow at different rates and different times. In modern humans, more than 90% of the adult neurocranial size is achieved by the M1 occlusion; facial growth and maturation, however, continue beyond this age 1 (Humphrey,1998; Viđarsdóttir et al,2002; Ackermann and Krovitz,2002; Cobb and O'Higgins,2004; Coqueugniot et al,2004; Guihard‐Costa and Ramírez Rozzi,2004; Mitteroecker et al,2004a,b; Viđarsdóttir and Cobb,2004; Bulygina et al,2006; Hublin and Coqueugniot,2006; Cobb and O'Higgins,2007; Coqueugniot and Hublin,2007; DeSilva and Lesnik,2008; Mitteroecker and Bookstein,2009; Neubauer et al,2009,2010; Harvati et al,2010; Gunz et al,2010,2011,2012; Coqueugniot and Hublin,2012; Leigh,2012; Neubauer and Hublin,2012; Neubauer et al,2012a). Developmental trajectories of the frontal bone are therefore the result of a combination of two developmental processes (Mitteroecker et al,2005; Mitteroecker and Bookstein,2007,2008), where size increase predates shape maturation.…”