The skull has a more carnivorous form; it has "a complete zygomatic arch, and the tympanic bone forms a bundle-like swelling on each side of the back of the skull.
The tympanum of the ear; -- often, but incorrectly, applied to the tympanic membrane.
The parietal bones in two of the 13 skulls are much eroded by some parasite (seemingly nematode worms) and in one of these two specimens the roof of the left tympanic cavity is perforated.
The small tympanic bullae of the specimens from Padre Island were commented upon by Nelson (op.
Exception is to be made for the ear and tympanic bullae, which are of approximately the same size in the two subspecies.
Nelson pointed out, the small size of the tympanic bullae was one of several evidences of intergradation there with Lepus californicus melanotis, the subspecies next adjacent to the north.
This is attached by its handle to the umbo of the tympanic membrane, while its head lies in the attic and articulates posteriorly with the upper part of the next bone or incus (fig.
The stapedius and tensortympanic muscles, the latter of which enters the tympanum in a canal just above the Eustachian tube to be attached to the malleus, modify the movements of the ossicles.
The inner wall shows a promontory caused by the cochlea and grooved by the tympanic plexus of nerves; above and behind it is the fenestra ovalis, while below and behind the fenestra rotunda is seen, closed by a membrane.
The outer wall is largely occupied by the tympanic membrane (fig.
In some mammals, especially Carnivora, the middle ear is enlarged to form the tympanic bulla, but the mastoid cells are peculiar to Man.
The tympanic bulla is large and the periotic and tympanic are fused together, but not as a rule to the squamosal.
There is no tympanic cavity or auditory ossicle in relation to the ear.
This forms a minute rod of bone, one end of which is expanded and fits into the fenestra ovalis, while the other end, terminated by a triradiate piece of cartilage, is attached to the tympanic membrane.
The tympanic bone remains permanently distinct, and the anterior boundary of the tympanic cavity is formed by the alisphenoid.
The carotid canal perforates the basisphenoid and not the tympanic bulla.
A backwardly-directed outgrowth from the cartilaginous bar more or less completely surrounds the tympanic membrane, forming the tympanic ring.
The tympanic is united with the periotic but not with the squamosal, and forms a large auditory bulla.
In Man and still more in Old World monkeys, the external auditory meatus is drawn out into a definite tube, whose lower wall is formed by the tympanic; in the Cebidae the tympanic is ring-like.
Tympanic bulla as large as foramen magnum; hind foot less than 74; geographic range limited to southern edge of Mexican tableland at high elevations Romerolagus diazi, p.
Tympanic bulla smaller than foramen magnum; hind foot more than 74; geographic range wholly in United States.
Hind feet densely covered with long hair; ear short; tympanicbulla of moderate size.
The form of the stapes, tabular and otic notch suggest a functional tympanic membrane, which could not have occurred in a gill-breathing larva.
Laterally the stapes carries a short, broad process that probably made contact with a dorsally placed tympanic membrane.
The white dorsolateral line usually is evident in the tympanic region, but in many individuals a dorsal pattern of lines and other marks is not evident.
The middle ear in man is a cavity inclosed by the temporal bone, and separated from the outer ear by the tympanic membrane.
This part of the ear incloses the auditory canal, which is closed at the inner end by a tightly stretched membrane, the tympanic membrane or ear drum.
Placed directly against the tympanic membrane and connecting it with the inner ear is a chain of three tiny bones, the smallest bones of the body.
For this reason, we open the mouth at the time of a heavy concussion and thus prevent the rupture of the delicate tympanic membrane.
When the muscle contracts, the handle of the malleus is drawn still farther inwards, and thus a greater tension of the tympanic membrane is produced.
The lateral inflation of the tympanic bullae can be interpreted as intergradation with the geographically adjacent S.
The slender rostrum and largetympanic bullae of No.
When the tympanic membrane receives a shock, that shock is transmitted through the series of bones above referred to, and is concentrated on the membrane against which the base of the stirrup bone is planted.
In the organ of hearing in man we have first of all the external orifice of the ear, which is closed at the bottom by the circular tympanic membrane.
The tympanic bone is preserved on the right side, though wanting on the left.
It is an irregular curved plate only slightly bullate, but forming a complete floor to thetympanic cavity.
The auditory ossicles were preserved in the tympanic cavities of both skulls, Nos.
The tympanic forms a tubular meatus auditorius externus directed outwards and slightly backwards.
The periotic and tympanicare welded together, but not with the squamosal.
The former has a wide but shallow floccular fossa on its inner side, and sends backwards a considerable "pars mastoidea," which appears on the outer surface of the skull between the post-tympanic process of the squamosal and the exoccipital.
We propose, then, to carefully examine the works of the Poet for any internal evidence of Typographical knowledge which they may afford.
Or what strong hand can hold Time's swift foot back?
The tympanic is welded with the periotic, which is attached to the base of the skull by two strong diverging processes.
Tympanic bone not welded with the periotic, which is usually only attached to the rest of the skull by ligament.
The tympanic process of the alisphenoid bone of the skull is short, not covering the cavity of the tympanum, nor reaching the paroccipital process.
During the act of swallowing, which opens the Eustachian tube, the rubber bag is forcibly compressed, which forces the air along the tube into the middle ear and facilitates the escape of the pent-up secretions in the tympanic cavity.
Cases of purulent infection, he further remarks, have not been met with where the disease occurs in the tympanic cavity.
They connect the tympanicmembrane with the labyrinth, and serve to convey the vibrations communicated to the membrane across the cavity of the tympanum to the internal ear.
To vibrate thetympanic membrane and the little ear-bones.
Now the vibrations of the tympanic membrane are passed along the chain of bones attached to its inner surface and reach the stirrup bone.
Fenestra ovalis and fenestra rotunda, the oval and the round window; two apertures in the bone between the tympanic cavity and the labyrinth of the ear.
Waves of sound reach the ear, and are directed by the concha to the external passage, at the end of which they reach the tympanic membrane.
The distinct crackle, or clicking sound, is due to the movement of the ear-bones and the tympanic membrane.
The surface of the auricle is convoluted to collect and transmit the vibrations of air by which sound is produced the auditory canal conducts these vibrations to the tympanic membrane.
The tympanic cavity communicates with the back part of the throat, by the Eustachian tube.
The plate of the stirrup is fixed by a membrane into the oval window of the inner wall of the tympanic chamber.
This tube is about one and a half inches long and lined with mucous membrane similar to that of the tympanic chamber and the throat.
This, in turn, may lead to a chronic inflammation of the canal and of the tympanic membrane.
In the skull the orbital cavity is nearly or quite surrounded by bone, and the tympanic bulla is large and inflated.
This genus also has the more primitive small and rugged tympanic bullae, which are inflated and more Cat-like in others.
The tympanic bulla is often very inflated, and if flatter, as in the Bears, is at any rate large and conspicuous.
In the skull the tympanicbulla is usually, as in the non-ruminating Artiodactyles, filled with loose bony tissue.
The annular tympanicis not ankylosed to the surrounding bones, a character found in other low mammals.
In the skull the tympanic bulla is often depressed, and is not so globular and obvious as in the Cats.
The tympanicbulla is hollow instead of being filled with cancellated bone; the cuneiform is not fused with the cuboid and navicular, though the latter are with each other; the lateral digits of the hind-feet are rudimentary.
It soon became recognized, however, that this operation did not effect a cure in all cases, more especially in those in which the disease involved the walls of the tympanic cavity.
After separating and reflecting forward the membranous from the bony portion, the upper posterior part of the tympanic ring is chiselled away until a view of the stapes can be obtained.
The tympanicmembrane is pierced by the paracentesis knife at its inferior posterior margin.
In order to make certain that a free opening exists between the antrum and the tympanic cavity, some warm boric lotion should be syringed through the opening of the aditus.
The seeker is next passed into thetympanic cavity, and its point directed upwards and backwards into the aditus, so that it rests on the floor of the latter, or its point may be inserted into the aditus through the mastoid wound.
If, however, there be considerable deafness, due to polypi or granulations blocking up the tympaniccavity and auditory canal, the hearing power may be improved by the operation.
The auditory canal and tympanic cavity are then carefully dried.
The technique of the injection depends on whether the operation is to be limited to the auditory canal and tympanic cavity, or is to involve the mastoid process.
The risk of injury to the meatal walls or tympanic membrane from involuntary movements of the patient during the operation is far greater than the risk of the anæsthetic.
The antrum, in the adult, is situated at a slightly higher level than the tympanic membrane, its floor roughly corresponding with a line drawn horizontally backwards through the middle of the posterior wall of the bony meatus.
Removal of Granulations from the Tympanic Cavity, 348.
This operation, however, should only be performed provided that the edge of the membrane is not adherent to the inner wall of the tympanic cavity, and there is no internal-ear deafness.
The first slit develops externally into the ear-passage, internally into the Eustachian tube, and in the middle a partition forms the tympanic ring and tympanum.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "tympanic" in a variety of sentences. We hope that you will now be able to make sentences using this word.
