How to use Occipital in a sentence
Here the opisthotic bone appears in the occipital region, as in the adult Chelonian.
The opisthotic lies between the epiotic and the lateral occipital with which it ultimately fuses; in some birds, e.g.
Birds possess an ear-muscle which at least acts as a tensor tympani; it arises near the occipital condyle, passes through a hole into the tympanic cavity, and its tendon is, in various ways, attached to the inside of the membrane and the neighbouring extracolumellar processes.
The apex of the cochlea is turned towards, and almost reaches the anterior wall of the occipital condyle; at most it makes but half a twist or turn; it possesses both Reissner's membrane and the organ of Corti.
The head is large, and the skull elongated, and elevated posteriorly into a transverse occipital crest.Advertisement
The bones which bear the two occipital condyles have given rise to much discussion, and the definition given by Huxley in the previous edition - "two occipital condyles, the basi-occipital region of the skull either very incompletely or not at all ossified" - requires revision.
On the other hand, some reptiles have the occipital condyle divided into two and produced either by the basi-occipital or by the exoccipitals.
The foramen magnum is flanked by two large knobs or occipital condyles that form a joint with the first cervical vertebra of the neck.
Clinical signs of syringomyelia secondary to occipital hypoplasia are usually recognized between 6 months and 3 years of age.
The affected area was located in the right occipital lobe, which controls vision on the left side of both eyes.Advertisement
The squamosals form part of the cranial wall, being firmly wedged in between the quadrate, prootic and occipital bones.
In the equally large Bramatherium and Hydaspitherium of India the horns of the males were complex, those of the former including an occipital pair, while those of the latter arise from a common base.
As regards their distinctive features, the antlers are of a complex type and situated close to the occipital ridge of the skull, and thus far away from the sockets of the eyes, with the brow-tines in adult males palmated, laterally compressed, deflected towards the middle of the face, and often unsymmetrically developed.
Thus the " Celtic " ox (Bos longifrons), from remote ages the common type in the Alpine regions, is characterized by the height of its forehead above the orbits, by its highly-developed occipital region, and its small horns.
A difficulty naturally arises with regard to the fact that in reptiles the occipital condyle by which the skull articulates with the vertebral column is single, although composed of three elements, whereas in amphibians and mammals the articulation is formed by a pair of condyles.Advertisement
The joined up path that signals travel down from retina to optic nerve then optic chiasm then occipital lobe is called the visual pathway.
Assemblies representing words of this category would be distributed over perisylvian and visual cortices in parietal, temporal and/or occipital lobes.
Dorsal Stream Occipital cortex to posterior parietal and frontal lobes.
The skull oval from ear to ear, showing plenty of brain room, and with a well-defined occipital protuberance.
A contrast of the segregated percept minus the fused percept showed parietal and occipital activation on the bank of the right intraparietal sulcus.Advertisement
The Atlas vertebra meets with the occipital condyles which flank the foramen magnum in the basilar part of the occipital bone of the skull.
Thus the rabbit and the dog are not absolutely blinded by removal of the entire cortex, but in man destruction of the occipital cortex produces total blindness, even to the extent that the pupil of the eye does not respond when light is flashed into the eye.
Rarely the eyes are the only affected body part, and in those cases the discharge is thought to involve the rostral occipital cortex.
It was, however, associated with a larger neural signal (over the contra-lateral ventral occipital cortex), than the unattended light.
The atlas vertebra meets with the occipital condyles which flank the foramen magnum in the basilar part of the occipital bone of the skull.Advertisement
One end is attached to the occipital bone of the skull.
By applying a darker color in the back of the head from the occipital bone to the nape, and a lighter shade to the rest, the distinctive shape of the haircut is emphasized.
The proOtic encloses between it and the lateral occipital the fenestra ovalis, into which fits the columella of the ear.
Few have any occipital crest, but several have the face ornamented by the outgrowth of a fleshy lobe or lobes.
The under jaws are hinged on to the quadrate bones, which extend obliquely backwards, and are immovably wedged in between the squamosal and the lateral occipital wings.
The distinction, therefore, between the movement of the eyeballs, elicited from the occipital (visual) cortex, and that of the hand, elicited from the cortex in the region of the central sulcus (somaesthetic), is not a difference between motor and sensory, for both are sensori-motor in the nature of their reactions; the difference is only a difference between the kind of sense and sense-organ in the two cases, the muscular apparatus in each case being an appanage of the sensual.
In man the occipital foramen, through which passes the spinal cord, is placed just behind the centre of the base of the skull, which is thus evenly balanced in the erect posture, whereas the gorilla, which goes habitually on all fours, and whose skull is inclined forward, in accordance with this posture has the foramen farther back.
Some authors have held that the bone on which the occipital condyles have been found most developed in some labyrinthodonts (2) represents a large basi-occipital bearing two knobs for the articulation with the first vertebra, whilst the skull of the batrachians of the present day has lost the basi-occipital, and the condyles are furnished by the exoccipitals.
Skull has a notably long vault with a bulbous occipital bone.