Pertaining to or forming the wing of the sphenoid; relating to a bone in the base of the skull, which in the adult is often consolidated with the sphenoid; as, alisphenoid bone; alisphenoid canal.
It occupies the posterior area of the orbit between the alisphenoid and palatine, and is in contact with these bones and the frontal.
Anteroventrally the sphenoidal fissure is bounded by the orbitosphenoid bone, and dorsolaterally by the alisphenoid bone.
The alisphenoid bone is large and forms part of the posteromedial wall of the orbit.
There is no alisphenoid canal, and the tympanics are very slightly connected with the rest of the skull.
The orbit is completely encircled by bone, and the alisphenoid assists the jugal and frontal in shutting it off from the temporal fossa, leaving however a communication between the two as the sphenomaxillary fissure.
In the skull of Perissodactyles an alisphenoid canal is found and the nasals are expanded behind.
A carotid canal is well seen in the Ursidae, and to a less extent in the Felidae; in the Canidae there is an alisphenoid canal (fig.
The alisphenoid canal, and postglenoid and paroccipital processes are well developed.
The skull in Artiodactyla differs from that in Perissodactyla in the fact that the posterior end of the nasal is not expanded and there is no alisphenoid canal.
The pterygoid plate of the alisphenoid is decidedly large, and there is no alisphenoid canal.
In nearly all Cebidae the parietal and jugal meet one another, separating the frontal and alisphenoid on the skull wall; in Man and all Old World monkeys, on the other hand, the alisphenoid and frontal meet and separate the jugal and parietal.
The nasals are not expanded posteriorly, and there is no alisphenoid canal[126].
The nasals are expanded posteriorly, and an alisphenoid canal is present.
The foramen lacerum medium is confluent with the foramen lacerum anterius, and the two together form an enormous vacuity on the floor of the skull, bounded chiefly by the exoccipital, basi-occipital, alisphenoid and squamosal.
A, 10) is small, but the pterygoid process of the alisphenoid is prominent.
There is no alisphenoid canal, and the orbit is confluent with the temporal fossa.
In them the orbit is not enclosed by bone; there is no alisphenoid canal, and there are five toes and fingers.
The alisphenoid canal, so important a feature in the Carnivora, may be present or absent.
There are a number of osteological characters which differentiate the two families; thus the alisphenoid canal is sometimes present.
It may be added that the facial part of the skull is small in Patriofelis, which appears, moreover, to have had an alisphenoid canal.
The alisphenoid canal is absent save in the aberrant Aelurus.
Thus there is an alisphenoid canal, and, as in Bears, there is a postglenoid foramen.
The skull, as in Hyaena, has noalisphenoid canal, but the bulla tympani is divided by a septum.
There is no alisphenoid canal; postglenoid and condyloid foramina are found.
A peculiarity of the skull is seen in the great size of the alisphenoid bulla, which is comparable in size and appearance with that of the Pig.
The skull is without post-orbital process, but has an alisphenoid canal.
An alisphenoid is lacking on the lower aspect of the skull.
Skull high and compressed, with an alisphenoid canal, a short facial portion, and the ascending branch of the lower jaw, as in Aeluropus, very tall.
As a rule, there is an alisphenoid canal; the cheek-dentition is p.
The single representative of the genus Viverricula resembles in many respects the genets, but agrees with the civets in having the whole of the under side of the tarsus hairy; the alisphenoid canal is generally absent.
The skull has no post-orbital process and no alisphenoid canal.
The raccoons (Procyon) are the first and typical representatives of the American section of the family, in which an alisphenoid canal is always wanting.
In front there is usually a cleft separating it from the alisphenoid region of the skull, through which the third division of the fifth nerve passes out.
The tympanic process of the alisphenoid bone of the skull is short, not covering the cavity of the tympanum, nor reaching the paroccipital process.
The base of the cranium is long and narrow; the alisphenoid is very obliquely perforated by the foramen rotundum, but the foramen ovale is confluent with the large foramen lacerum medium behind.
There is a distinctalisphenoid canal for the passage of the internal maxillary artery.
Between the alisphenoid and the squamosal there is a clear demarcation posteriorly from a point directly lateral to the foramen ovale.
This demarcation permits a transverse rounding of the alisphenoid to form a longitudinal ridge between the anterior margin of each bulla and the base of the pterygoid of the same side.
Nevertheless, there is no such specialization of this primitive, structural feature such as occurs in some African and Asiatic mustelids in which the tympano-pterygoid part of the alisphenoid fuses with the tip of the hamulus of the pterygoid.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "alisphenoid" in a variety of sentences. We hope that you will now be able to make sentences using this word.
