A method for diagnosing cranial bone displacement by determining the location of characteristic points on the skull such as an occipital point situated on the protuberance of the occipital bone at the centre of the occiput, a frontal point situated at the intersection of the external base of the skull and the sagittal suture of the frontal bone, a right-hand temporal point situated at the intersection of the external base of the skull and a vertical line from the right-hand mandibular notch, a left-hand temporal point situated at the intersection of the external base of the skull and a vertical line from the left-hand mandibular notch, and a diagnostic point situated at the intersection of a line passing through the occipital and frontal points and a line passing through the right-hand temporal point and the left-hand temporal point; the distance between the occipital and frontal points is measured along the right-hand outer part of the head and, separately, along the left-hand outer part of the head, the distance between the right-hand and left-hand temporal points is measured across the frontal bone, and the distance between said points is measured across the occipital bone, the distances between the occipital point and the diagnostic point and between the frontal point and the diagnostic point are measured across the upper part of the skull, and the distances between the left-hand temporal point and the diagnostic point and between the right-hand temporal point and the diagnostic point are measured, the values of the corresponding results obtained are compared and cranial bone displacement is determined according to the deviation of said values from zero.L'invention concerne un procédé de diagnostic de déplacement des os du crâne consistant à déterminer l'emplacement de points caractéristiques sur le crâne, comme un point arrière se situant sur une protubérance de l'os occipital au centre de la nuque, un point frontal se trouvant sur l'intersection de la base ext