United States or South Sudan ? Vote for the TOP Country of the Week !
Strange to say, there have been reports of cases in which the ossicles were deficient without causing any imperfection of hearing. Caldani mentions a case with the incus and malleus deficient, and Scarpa and Torreau quote instances of deficient ossicles.
The bridge of bones, being pivoted at one point to the walls of the middle ear, forms a lever in which the malleus is the long arm, and the incus and stapes the short arm, their ratio being about that of three to two. This causes the incus to move through a shorter distance, but with greater force than the end of the malleus.
Excessive growth; thickening or enlargement of any part or organ. Applied to the four front teeth of both jaws, which have sharp, cutting edges. Incus. An anvil; the name of one of the bones of the middle ear. Indian Hemp. The common name of Cannabis Indica, an intoxicating drug known as hasheesh and by other names in Eastern countries. Inferior Vena Cava.
The structure of the eye and ear in exact confirmity to the laws of optics and acoustics, shows as clearly as any experiment can show anything, that the source, cause or origin is common both to the properties of light and the formation of the lenses and retina in the eye both to the properties of sound and the tympanum, malleus, incus and stapes of the ear.
The chains of mountains which crown the two hemispheres, and more than six hundred rivers which flow right to the sea from the feet of these rocks; all the streams which come down from these same reservoirs, and which swell the rivers, after fertilizing the country; the thousands of fountains which start from the same source, and which water animal and vegetable kind; all these things seem no more the effect of a fortuitous cause and of a declension of atoms, than the retina which receives the rays of light, the crystalline lens which refracts them, the incus, the malleus, the stapes, the tympanic membrane of the ear, which receives the sounds, the paths of the blood in our veins, the systole and diastole of the heart, this pendulum of the machine which makes life.
These bones are three in number, and from their shape are called the malleus, or hammer, incus, or anvil; and stapes, or stirrup. The hammer is attached by its long handle to the inner surface of the drum of the ear. The round head is connected with the anvil by a movable joint, while the long projection of the anvil is similarly connected with the stirrup bone.
Word Of The Day