Table 1.

Landmarks used in analysis of the brain and skull.

LM No.	Abbreviations	Skull landmarks used in linear distances
S1	amsph	Most antero-medial point on the body of the sphenoid
S2	bas	Mid-point on the anterior margin of the foramen magnum, taken on basioccipital
S3	lsqu	Most superior point on the squamous temporal, intersection of the coronal suture, left side
S4	loci	The superior posterior point on the ectocranial surface of the occipital lateralis on the foramen magnum
S5	lpto	Most postero-medial point on the parietal
S6	lsyn	Most antero-lateral point on the corner of the basioccipital
S7	rsqu	Most superior point on the squamous temporal, intersection of the coronal suture, right side
S8	roci	The superior posterior point on the ectocranial surface of the occipital lateralis on the foramen magnum
S9	rpto	Most postero-medial point on the parietal
S10	rsyn	Most antero-lateral point on the corner of the basioccipital
LM No.	Abbreviations	Brain landmarks used in linear distances
B1	ac	Anterior commisure at midline
B2	aptc	Intersection of pons with most caudal aspect of the ventral cerebral surface
B3	gcc	Genu of corpus callosum
B4	midcb	Most caudal point on cerebellar surface
B5	lobc	Most superolateral point of intersection of olfactory bulb with anterior frontal lobe surface, left side
B6	lpol	Most caudolateral point on occipital lobe surface, left side
B7	obnp	Most superiomedial point on the surface of the brain indicating the intersection of the olfactory bulbs with the nasal passages
B8	robc	Most superolateral point of intersection of olfactory bulb with anterior frontal lobe surface, right side
B9	rpol	Most caudolateral point on occipital lobe surface, right side
B10	spcc	Most superiomedial point on the surface of the brain indicating the intersection of the most posterior portions of the left and right halves of the occipital lobes

Landmark locations are shown in Figure 2.