Just in front of the membrane on the outer wall is the Glaserian fissure leading to the glenoid cavity, and close to this is the canal of Huguier for the chorda tympani nerve.
The scala vestibuli and scala tympanicommunicate at the apex of the cochlea by an opening known as the helicotrema, so that the perilymph can here pass from one canal to the other.
At the same time indications of the scalaetympani and vestibuli appear.
The external auditory meatus, tympanum and Eustachian tube are remains of the hyomandibular cleft, the membrana tympani being a remnant of the cleft membrane and therefore lined by ectoderm outside and entoderm inside.
Lower down is a little pyramid which transmits the stapedius muscle, and at the base of this is a small opening known as the iter chordae posterius, for the chorda tympani to come through from the facial nerve.
The mucous membrane lining the tympanum is continuous through the Eustachian tube with that of the naso-pharynx, and is reflected on to the ossicles, muscles and chorda tympani nerve.
In this class the tympanum and Eustachian tube are first developed; the membrana tympani lies flush with the skin of the side of the head, and the sound-waves are transmitted from it to the internal ear by a single bony rod--the columella.
This branch forms the praespiracular nerve of the adult, and is homologous with the chorda tympani of Mammalia.
The latter channels form the scala vestibuli on the upper side of the cochlear canal and the scala tympani on the lower.
The scala tympani is separated from the cochlear canal by a thicker sheet of mesoblast, called the basilar membrane, which supports the organ of Corti and the epithelium adjoining it.
The labium tympanicum is formed by the coalescence of the connective tissue layer separating the scala tympani from the cochlear canal with part of the connective tissue of the lamina spiralis.
The first mention of petty constables occurs in 1252, in a writ of Henry III.
Hurst's view is that with each movement of the stapes a wave is generated which travels up the scala vestibuli, through the helicotrema into the scala tympaniand down the latter to the fenestra rotunda.
As the membranatympani is not only fixed by its margin to a ring or tube of bone, but is also adherent to the handle of the malleus, which follows its movements, its vibrations meet with considerable resistance.
The membrana tympaniis capable of being set into vibration by a sound of any pitch included in the range of perceptible sounds.
The vibrations of the membrana tympani are transmitted to the internal ear partly by the air which the middle ear or tympanum contains, and partly by the chain of bones, consisting of the malleus, incus and stapes.
There is some shrieking and shuddering, and ominous thudding of the tympani (which are tuned to unusual notes), then follows a short recitative which might represent Dante's query to Francesca how she came to yield to love.
An abrupt silence prepares for a fierce thunderous clamor from the tympani and the great drum (beaten with the sticks of the side-drum).
The wood-winds are grouped together on the uppermost six staves, the brass in the middle with the tympani separating the horns and trumpets from the trombones, the strings on the lowermost five staves.
The tympani are hemispherical brass or copper vessels, kettles in short, covered with vellum heads.
Each of these is supported by a series of Moorish arches, the tympani of which are ornamented with tracery, or an ornamentation of leaves in a geometrical and Oriental manner.
The skull, as in Hyaena, has no alisphenoid canal, but the bulla tympani is divided by a septum.
As in Dorcopsis, but not as in Macropus, the bulla tympani is not swollen.
An instance of herpetic glossitis from probable irritation of the chorda-tympani nerve by an aural polypus (Berkely Hill[67]) seems to lend some force to this opinion.
Although the membrana tympani was in no instance quite normal, in none were there found adequate changes to account for the deafness.
Nervous irritation, such as of the chorda-tympani nerve, is attributed as a causal influence of unilateral vesicular glossitis, herpetic or otherwise, and as a probable factor in other varieties of unilateral glossitis.
Being thin and delicately poised, the membrana tympani is easily made to vibrate by the sound waves that enter the auditory canal.
It is above the scala tympani and below the scala vestibula, and is separated from each by a membrane.
The middle ear is also called the ear drum, and, by the same system of naming, the membrana tympani is referred to as the drum membrane.
Both the scala vestibula and the scala tympani belong to the outer portion of the internal ear and are, for this reason, filled with the perilymph.
In the second place, the middle ear provides a means for concentrating the force of the sound waves as they pass from the membrana tympani to the internal ear.
Extending across the middle ear and connecting with the membrana tympani on one side, and with a membrane closing a small passage to the internal ear on the other, is a tiny bridge formed of three small bones.
The bridge of bones and the air in the middle ear receive vibrations from the membrana tympani and communicate them to the membrane of the internal ear.
The area of the membrana tympani is about twenty times as great as the membrane of the internal ear which is acted upon by the stapes.
In the first place, it makes it possible for sound waves to set the membrana tympani in vibration.
The mobility of the membrana tympani should be tested by inflating the tympanum or by means of Siegle's pneumatic speculum.
The sense of taste is often impaired from involvement of the chorda tympani nerve.
At one point in the Scherzo, presumably at the startling entry of the tympani at the ritmo di tre battute, the listeners could scarcely restrain themselves, and it seemed as if a repetition then and there would be insisted upon.
He made so many changes in the tympani part of the Agnus Dei that he wore a hole in the very thick paper, his aim being, apparently, by means of a vague rhythm to suggest the distance of the disturbers of the peace.
This is the result of the air in the middle ear escaping through the Eustachian tube, when the vibrations of the membrana tympani are violent.
The supposed office of the tympanum is to transmit the vibrations made on the membrana tympani to the internal ear.
The membrana tympani serves to facilitate the transmission of sounds, and also to moderate their intensity.
The small openings of the middle ear are for the entrance and exit of the chorda tympani, (a small nerve that crosses the tympanum,) and for the exit of the muscles that act upon the membrana tympani and bones of the ear.
In the case of the malleus there may be some resistance owing to the attachment of the tendon of the tensor tympani muscle.
In doing this the chorda tympani nerve may perhaps also be cut, resulting in loss of taste on the affected side for a time; this is a matter of no importance.
To do this it may be necessary to chisel away the tegmen tympani outwards until the squamous portion of the temporal bone is reached, after which a pair of bone forceps may be used until a sufficient opening is obtained.
In removing the bone, it must be remembered that the tegmen tympani is exceedingly thin, and unless care is taken pieces of bone may be pressed inwards on to the overlying dura mater.
This, perhaps, may be possible if it is combined with other intratympanic operations, such as division of the anterior ligament or of the tensor tympani muscle.
In this instance the bone is being removed above the tegmentympani in order to expose the lower portion of the middle fossa.
This procedure in the case of polypi arising from the region of the tegmen tympani has been known to give rise to fatal meningitis.
After cutting through the tensor tympani muscle, the loop of the snare is threaded over the head of the malleus and guided upwards until it embraces its neck.
In doing so he may suddenly meet with a gush of purulent discharge coming through an opening in the bone in the region of the tegmen tympani or sigmoid sulcus.
A, Curette inserted round handle of malleus; B, Curette pushed upwards, in act of cutting through tendon of tensor tympani muscle.
In this particular case, division of the tensor tympani with Schwartze’s tenotome and then extraction of the malleus by means of Sexton’s forceps is a better procedure than trying to encircle its shaft with Delstanche’s ring-knife.
Steps led up to the altar, and upon them were disposed young priests and priestesses with tympani and sistrums, with flutes and tabours.
One form of this (as I conclude from observation in my own ears) depends upon spasmodic vibration of the tensor tympani or stapedius muscle.
When an opening has been made in the membrana tympani either by incision or ulceration, it is advisable in some instances to inflate the tympanum by Politzer's method, which has been alluded to above.
Hence severe earache, an increase of the febrile movement, and outward bulging of the membrana tympani occur.
An examination with the speculum and reflected light showed an oedematous and bulging membrana tympani (posterior half), the neighboring parts being very red, though as yet but little swollen.
The chordæ tympani nerve ordinarily lies too high up to be wounded.
You were never more mistaken, for I despise the piano as a shallow compromise between the harp, tympani and those Eastern tinkling instruments of crystal and glass, or dulcimers and cymbalum.
I will exult, even if my skin crackles in hell-fire, when the children of the earth listen to my Tympani Symphony, and go crazy with its tappings!
I kiss his memory--he appreciated the tympani and their noble mission in music.
The introductory allegro is devoted to some tympani thumps--a la Meyerbeer--and some blaring fanfares which terminate in a loud, blatant theme.
Arthur Hahn believes that this symphonic poem offers a solution to the discord of the universe; that the ending with the two tympani taps and the hollow preceding chords suggest a possible return of the storm.
The primary change is the broad opening between the utriculus and the scala tympanifrom which results the streaming of the endolymph from the semicircular canals into the cochlea.
The tegmen tympani are relatively large, but proportionately short.
Chorda tympani branch of the facial nerve in the middle ear of tetrapods.
The auditory regions are relatively massive and bear narrow tegmen tympani; the distal ends of the tegmen tympani are medial to the lateral edge of the pterygoids in dorsal view.
The delicate, spindle-shaped columellae lie ventral to the tegmen tympani and squamosals, are spatulate distally, and have a broad basal attachment to the auditory region.
The tegmentympani of all three species are massive.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "tympani" in a variety of sentences. We hope that you will now be able to make sentences using this word.
