The region of the skull between the two parietal foramina where the closure of the sagittal suture usually begins.
All the foramina for the transmission of the sensiferous nerves are large, the auditory particularly so; while the foramen, through which the carotid artery enters the skull, is small.
The super and infra orbital foraminaare very large, and the orbits are broad, with the orbital ridge sharp and prominent.
What are the different foramina of the sphenoid bone, and what structures pass through them?
Then perhaps you can tell me what the structures are which pass through the foramina of the sphenoid?
In comparing the ventral views of skulls note especially the size and location of incisive foramina and posterior palatine foramina as well as the breadth of mesopterygoid fossae.
Also, if two lateral anterior foramina are present, the point of intersection of two perpendicular lines of an ocular grid determined which tooth-socket occurs directly below the center of the posterior foramen (Fig.
N = 12) directly below center of posterior foramen (if only two foramina present).
The exoccipitals form the two condyles but there are noforamina for the 11th and 12th nerves, since these are not separate in modern Amphibia.
The super-orbital foramina just under the horns, which are marked in most antelope and deer, are very minute in Pantholops.
Scattered all over the auricular wall are minute depressions, the foramina Thebesii, some of which receive small veins from the substance of the heart.
Foramina Thebesii and venae minimae cordis are found in this auricle, as in the right, although the chamber is one for arterial or oxidized blood.
IX, X foraminafor the ninth and tenth cranial nerves.
Most of the numerous foramina perforating the skull walls will be described after the bones have been dealt with.
Between the trigeminal and optic foramina are the very small foraminafor the sixth nerves (fig.
In some Theromorpha all the bones of the pelvis are completely fused, forming an os innominatum as in mammals; the pubes and ischia are so completely fused that sometimes as in Pariasaurus even the obturator foramina are closed.
The optic foramina are united to form a single hole, much as in birds.
Slightly in front of and an eighth of an inch external to the hypoglossal foramen the cranial wall is pierced by a pair of foramina through which the tenth or pneumogastric nerves leave (fig.
The neural arch is broad and regular; it has no spinous process, and is perforated in front by a pair of foramina for the passage of the first spinal nerves.
In the Sloths the pelvis is rather weak and slender, the obturator foramina are very large and the ischia do not meet in a symphysis.
Their number may be reckoned from the number of foramina for the exit of spinal nerves.
B and C, 11), pierced by theforamina for the exit of the optic nerves.
Two prominent foramina are to be seen in the lower jaw.
Two foramina pierce the exoccipital just in front of the occipital condyle and transmit respectively the glossopharyngeal and pneumogastric (fig.
The bony palate is short, its hind margin extending back only to the middle of the median molar; its anterior foramina are small; and it differs from that of Microcebus and Chirogale in having its posterior perforations small.
Defn: The region of the skull between the two parietal foramina where the closure of the sagittal suture usually begins.
After the various osseous foramina have been closed, the cranial cavity is filled through the occipital foramen with any one of a number of substances (millet, shot, water, etc.
The two foramina of the pupils ought to be equal in size, circular and with a clearly marked contour.
Brownsville, Texas, and those of 40 specimens from different localities in Tamaulipas are about the same except that the anterior palatine foramina average longer in Tamaulipas.
In congenital hydrocephalus, as there is no blocking of the passages at the fourth ventricle, the foramina being as a rule much larger than normal, no form of drainage is beneficial.
On leaving the cord the nerves incline slightly downwards towards the foramina by which they make their exit from the canal.
Fractures of the base usually take the form of a single fissure, or a series of fissures, which, as a rule, run through the foraminain their track.
When in Fishes the sarcous system begins to produce viscera, then the five branchial foramina pass inwards, and only a single respiratory aperture is left for them in the fleshy body; namely, the external branchial foramen.
These foramina of the lateral line are arrested, and metamorphosed branchial foramina, which have only retained the evaporative function of respiration.
The river or lesser Lampreys stick in the mud; the Lampreys cling fast by suction to stones, and do not draw the water in through the mouth, but through the branchial foramina themselves, like the lower animals.
In the Salamanders and Frogs these branchial foramina are persistent for a longer time, frequently through the whole period of life; but in Birds and Mammalia they disappear, while they are in the embryo state.
There are generally no foramina in the body, but only fissures without orifices.
So, too, in the development of the skeleton, ossification proceeds from separate centres, foramina are formed by the fusion of separate bones round them.
This unity of composition can be established, on the gradation method, by considering the connections of the bones of the skull with one another, their relations to the parts of the brain and to the foramina of the principal cranial nerves.
Shape of presphenoid, nasals, interparietal, frontoparietal sutures, and length and degree of the openings of the incisive foramina are useful in delimiting subspecies.
Animals which live far away from large rivers usually have largerforamina than animals which live close to rivers.
The palatine foramina of Petrogale are so large that the posterior part of the bone is only a narrow thickened ridge.
In the skull the infra-orbital foramen is small; the incisive foramina are very large.
Machaerodus is placed among the Felidae on account of the fact that the condyloid and carotid foramina unite with the foramen lacerum posterius.
There is a faint development of these ridges, but behind the palatine foramina in Dasyprocta aguti.
There is no alisphenoid canal; postglenoid and condyloid foraminaare found.
The width of the interspace between the foramina is one-half the width of the vertebrae, though this character varies with different genera and species.
If their cavities were connected with the lungs the foramina are inconspicuous and unlike the immense holes seen in the sides of the vertebrae.
Yet the kind of heart which is always associated with vital structures such as Pterodactyles are inferred to have possessed from the brain mould and the pneumatic foramina in the bones, is the four-chambered heart of the bird and the mammal.
In the Stonesfield Slate and Solenhofen Slate the slender transverse processes from the vertebrae blend with the ilium of the hip girdle, and form a series of transverse foramina on each side of the bodies of the vertebrae.
Distance from inner margin of maxillary foramen to tip of protuberance much more than one-half the distance between the maxillary foramina of the two sides.
The premaxillae are noticeably constricted immediately in front of the premaxillary foramina, and the expanded portion just behind these foramina is nearly horizontal, with a low transverse ridge near the middle.
An oblong mass, with two grooves on each side, two widely separate foramina above and two closely approximated below, entering a common depression, with rounded projections on its borders.
Inferior foramina nearly as far apart as superior and posterior epiphysis much smaller than anterior.
The distance between the maxillary foramina is less than that from the median line to the anteorbital notch.
Similar but much smaller foramina occur on the sides of the centra of the eighth and ninth caudals.
The maxillary foramina are large and directed forward, and have a distinct broad channel in front of them.
The premaxillary foramina are a little behind the maxillary foramina.
The atlas, axis, and third cervical are firmly anchylosed throughout, save for the lateral foramina for the passage of the cervical nerves.
There are severalforamina on the lateral surface of the prootic.
On the anterolateral surface of the prootic, branches of the trigeminal nerve pass through three foramina whereas the facial nerve passes through the single posterior foramen near the otic notch.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "foramina" in a variety of sentences. We hope that you will now be able to make sentences using this word.
