basicranial

Now comes the important question, can we discern, between the lowest and the highest forms of the human cranium anything answering, in however slight a degree, to this revolution of the side and roof bones of the skull upon the basicranial axis observed upon so great a scale in the mammalian series?

Essays 2007

In an adult male Gorilla the cerebral length is as 170 to the basicranial axis taken as 100, in the Negro

Essays 2007

Again, a line drawn through the axis of the face, between the bones called ethmoid and vomer — the “basifacial axis” (‘f e’.) forms an exceedingly obtuse angle, where, when produced, it cuts the ‘basicranial axis.’

Essays 2007

So that, at last, in the human skull (Fig. 29), the cerebral length is between twice and thrice as great as the length of the basicranial axis; the olfactory plane is 20 degrees or 30 degrees on the

Essays 2007

But if a series of sections of mammalian skulls, intermediate between a Rodent and a Man (Fig. 28), be examined, it will be found that in the higher crania the basicranial axis becomes shorter relatively to the cerebral length; that the ‘olfactory angle’ and ‘occipital angle’ become more obtuse; and that the ‘cranio-facial angle’ becomes more acute by the bending down, as it were, of the facial axis upon the cranial axis.

Essays 2007

The length of the basicranial axis as to this length, or, in other words, the proportional length of the line

Essays 2007

It will be obvious, from an inspection of the diagrams, that the basicranial axis is, in the ascending series of Mammalia, a relatively fixed line, on which the bones of the sides and roof of the cranial cavity, and of the face, may be said to revolve downwards and forwards or backwards, according to their position.

Essays 2007

L.ngitudinal and vertical sections of the skulls of a Beaver ( 'Castor Canadensis'), a L.mur ( 'L. Catia'), and a Baboon ( 'Cynocephalus Papio'), 'a b ', the basicranial axis;' b c ', the occipital plane;' i T ', the tentorial plane; 'a d', the olfactory plane; 'f e', the basifacial axis; 'c b a', occipital angle;

Lectures and Essays Thomas Henry Huxley 1860

It will be obvious, from an inspection of the diagrams, that the basicranial axis is, in the ascending series of Mammalia, a relatively fixed line, on which the bones of the sides and roof of the cranial cavity, and of the face, may be said to revolve downwards and forwards or backwards, according to their position.

Lectures and Essays Thomas Henry Huxley 1860

So that, at last, in the human skull (Figure 29), the cerebral length is between twice and thrice as great as the length of the basicranial axis; the olfactory plane is 20 degrees or 30 degrees on the

Lectures and Essays Thomas Henry Huxley 1860