The JAW JOINT, or temporo-mandibular articulation, occurs between the sigmoid cavity of the temporal bone and the condyle of the jaw.
The joint between the temporal and mandibular bones is only found in Mammals; in the lower vertebrates the jaw opens between the quadrate and articular bones.
The lower portion of the mandibular arch becomes greatly thickened to support the lower or hinder edge of the mouth.
Chondrocranium of a young Lepidosiren, showing the suspension of the lower jaw by the upper portion of the mandibular arch.
There is not the slightest trace of mandibular fangs, of jaws, of mouth parts for seizing and grinding.
Not at all, for, instead of having their points facing each other, as would be required in a realmandibular apparatus, the two hooks work in parallel directions and never meet.
In the absence of the mandibular palp in all the Zoaea forms, its actual atrophy in the Penaeus Zoaea, and its universal reappearance in adult Malacostraca, are cases which tell in favour of the above explanation.
The larva of Cythere at the time of birth has rudiments of all the limbs, but the mandibular palp still functions as a limb, and the three feet (2nd pair of maxillae and two following appendages) are very rudimentary.
Again the second and third appendages, though locomotive in function are neither of them biramous, and the third one already contains a rudiment of the future mandibular blade, and terminates in an anteriorly directed hook-like bristle.
It seems not impossible that the appendage regarded by Claus as the mandibular palp may really represent the maxilla, which would otherwise seem to be absent.
Suppurative parotitis may be due to direct spread of infection from the mouth along the parotid duct, or to extension of suppurative processes from the temporo-mandibular joint, the jaw, or a lymph gland.
Mandibular cleft occurs in the middle line of the lower lip, and may extend to, or even beyond, the chin; it is due to non-union of the two lateral halves of the mandibular arch.
The lingual branch of the mandibular (inferior maxillary) supplies the anterior two-thirds with common sensation.
The primitive buccal cavity is bounded below by the mandibular arch, which contains Meckel's cartilage, and from which are developed the mandible, the lower lip, and the floor of the mouth.
The facial and acoustic nerves and the maxillary and mandibulardivisions of the trigeminal are frequently implicated.
From the lateral and back part of the mandibular arch springs the maxillary process, which grows upwards and blends with the lateral nasal process across the naso-orbital cleft--the deeper portion of which persists as the nasal duct.
Arthritis# of the temporo-mandibular joint occurs in two forms, non-suppurative and suppurative.
Not infrequently it burrows into the temporo-mandibular joint, or escapes by bursting into the external auditory meatus.
Microstoma is due to excessive fusion of the maxillary and mandibular processes.
In a lateral view of the mouth, the extreme tip of the mandibularorgan could sometimes be seen just projecting out of the hood.
The mandibular organ, when separated and carefully examined, presents the appearance, represented from a camera drawing, in (Pl.
Both the mandibular and maxillary tooth-rows are relatively longer than in the generalized skull, providing a longer block for the planing action of the lower molariform teeth.
A shallow but well-marked depression on each side of the head indicates the posterior boundary of the mandibular arch.
The fifth nerve, as has already been mentioned, bifurcates over its dorsal summit, and the mandibular branch of that nerve passes down on its posterior and outer side.
In each of the remaining arches there is a segment of the original body-cavity fundamentally similar to that in the mandibular arch.
The posterior part lies completely within the mandibular arch, and is closely connected with the mandibular division of the fifth nerve.
The next division of the head-cavity, which from its position may be called the mandibular cavity, presents during the stages I and K a spatulate shape.
In the Bird Dr Mueller's figures shew that the thyroid body develops in the region of the hyoid arch, whereas, in Elasmobranchii, it develops in the region of the mandibular arch.
The first or hyomandibular pouch, placed between the mandibular and hyoid arches, has rather the character of a double layer of hypoblast than of a true pouch, though in parts a slight space is developed between its two walls.
There are then a pair of these in front of the mandibular arch, a pair in the mandibular arch, and a pair in each succeeding arch.
Both sections shew the commencing formation of the thyroid body (th) at the base of the mandibular arch.
Embryology thus appears to teach us that the fifth nerve is a single nerve supplying the mandibular arch, and not, as has been usually thought, a complex nerve resulting from the coalescence of two or three distinct nerves.
The Ostracoda might have been derived from the same stock were it not that they retain the mandibular palp which all the Phyllopods have lost.
These may be formed by the modification of almost any of the appendages, often the antennules or antennae or some of the thoracic limbs, or even the mandibular palps (some Ostracoda).
In 1910 I had the opportunity to report on the mandibular hyperostoses in a rare collection of crania and lower jaws of the central and Smith Sound Eskimo.
They have been given the convenient, though both etiologically and morphologically inaccurate, name of "mandibular torus"; I think mandibular hyperostoses or simply welts would be better.
The condyloid process of the lower jaw is high, mandibular notch deep.
It is smaller than the other Cuban specimens and except for longer condylocanine length, longer mandibular tooth-rows, narrower interorbital region, and heavier dentition is indistinguishable in measurements from the largest specimens of L.
For the cuticular bots having no plane surface to move upon, and imbibing a liquid food, in them the mandibularhooks would be superfluous.
Besides their mandibular hooks, some of these grubs supply the want of legs by means of claws at their anus.
Female similar to the male but duller, and with the bill all black, and without the blackmandibular stripe.
Clastes, regarded by Eastman as fully identical with Lepisosteus, is said to have the "mandibular ramus without or with a reduced fissure of the dental foramen, and without the groove continuous with it in Lepisosteus.
The lateroventral surface of the angular contains sensory pores of the mandibular line.
Plaiting or joining together; -- said of a bone next above the quadrate in the mandibular suspensorium of many fishes, which unites together the other bones of the suspensorium.
Anything which suspends or holds up a part: especially, the mandibular suspensorium (a series of bones, or of cartilages representing them) which connects the base of the lower jaw with the skull in most vertebrates below mammals.
If the ophthalmic branch is not involved, neither it nor the ganglion should be interfered with; the maxillary and mandibular divisions should be divided within the skull, and the foramen rotundum and foramen ovale obliterated.
It must not be confused with the fixation of the jaw sometimes associated with a wisdom-tooth gumboil, with tonsillitis, or with affections of the temporo-mandibular articulation.
Excision has been practised with success in the hip, knee, elbow, and temporo-mandibular joints.
Where the mandibular folds come together posterior to the mouth, they fuse first at their outer or ventral border, which leaves a deep, narrow groove in the anterior floor of the mouth.
Close to the sides of the thyroid are seen two large blood vessels, ar, the mandibular arches, which unite into the single ventral aorta just caudad to the posterior end of the thyroid.
It passes through the mouth, seen as a vertical opening between the two mandibular arches, md.
The pharynx, ph, is very wide; as it is followed caudad its ventral opening is gradually closed by the approach of the twomandibular folds.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "mandibular" in a variety of sentences. We hope that you will now be able to make sentences using this word.
