[Can one speak of the "recession" of the frontal bone?]

The receding aspect of the frontal bone in Primates and fossil men, comes primarily from the orientation adopted and the nature of the point chosen, the ontogenic shift of which is important. There is a confusion between shape and position notions. A study in the "vestibular" axes demonstrate that the inclination of the squamous portion of the frontal bone is significantly less variable then has been claimed, especially if one considers the endocranium.