cranial index

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Related to cranial index: Mesaticephalic, dolichocephalic, brachycephalous

cranial index:

see cephalic indexcephalic index
[Gr. kephale=head], ratio of the breadth of the head to its length. Expressed as a percental number, it provides the simplest description of the geometric relation of two dimensions.
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Cranial Index


the ratio of the maximum breadth of the skull (transverse diameter) to its maximum length (longitudinal diameter) expressed as a percent. The cranial index is used in anthropology to characterize the shape of the skull in the horizontal plane. Low values reflect a relatively long and narrow skull. An index not greater than 74.9 is indicative of dolichocrany, whereas indexes of 75–79.9 and 80 or greater reflect mesocrany and bradycrany, respectively. The cranial index of humans does not reflect intellectual capacity. The index is used as a means of distinguishing anthropological racial types from skeletons.

cranial index

[′krān·ē·əl ′in‚deks]
The ratio of maximum skull height to maximum skull breadth multiplied by 100.
References in periodicals archive ?
Similarly, looking at cranial index we find little if any difference between northern Indian males (70.7-72.3) and southern Indian males (71.3-73.0) or between Indo-Aryan males (70.7-72.2) and Dravidian males (71.3-73.0).
Ultimately, development of the squamous part of the frontal bone with its orbital part (pars orbitalis) and orbital margin (margo orbitalis), being the components of the dimension Ectorbitale-Ectorbitale, had the greatest effect on a decreasing value of the cranial index 1, with an increasing length of the viscerocranium.
Cranial index = Cranial breadth/Cranial length x 100.