semicircular canals

semicircular canals
The two sets of three canals in the human ear, which are at right angles to each other. The set of semicircular canals acts to sense angular rotation about each of the three axes. Each of the canals is filled with fluid, and there is a flaplike structure called a cupula at the end of each canal. These canals are the main vestibular organs that give us a sense of spatial orientation in the absence of visual clues. The system is unable to sense small angular velocities and thus is nearly useless in flight, often sending false signals to the brain.

Aviation dictionary. 2014.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • Semicircular canals — Semicircular Sem i*cir cu*lar, a. Having the form of half of a circle. Addison. [1913 Webster] {Semicircular canals} (Anat.), certain canals of the inner ear. See under {Ear}. [1913 Webster] …   The Collaborative International Dictionary of English

  • semicircular canals — three tubes that form part of the membranous labyrinth of the ear. They are concerned with balance and each canal registers movement in a different plane. At the base of each canal is a small swelling (an ampulla), which contains a crista. When… …   Medical dictionary

  • semicircular canals — n. three small canals of the inner ear filled with fluid that help to keep a person s balance …   English contemporary dictionary

  • semicircular canals — three tubes that form part of the membranous labyrinth of the ear. They are concerned with balance and each canal registers movement in a different plane. At the base of each canal is a small swelling (an ampulla), which contains a crista. When… …   The new mediacal dictionary

  • semicircular canals — plural noun a system of three fluid filled bony channels in the inner ear, involved in sensing and maintaining balance …   English new terms dictionary

  • semicircular canals — …   Useful english dictionary

  • Semicircular canal — Exterior of labyrinth …   Wikipedia

  • semicircular duct — n any of the three loop shaped membranous inner tubular parts of the semicircular canals that are about one fourth the diameter of the corresponding outer bony canals, that communicate at each end with the utricle, and that have near one end an… …   Medical dictionary

  • Semicircular — Sem i*cir cu*lar, a. Having the form of half of a circle. Addison. [1913 Webster] {Semicircular canals} (Anat.), certain canals of the inner ear. See under {Ear}. [1913 Webster] …   The Collaborative International Dictionary of English

  • semicircular canal — noun one of three tube loops filled with fluid and in planes nearly at right angles with one another; concerned with equilibrium • Hypernyms: ↑sense organ, ↑sensory receptor, ↑receptor • Part Holonyms: ↑inner ear, ↑internal ear, ↑labyrinth, ↑ …   Useful english dictionary

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”