cochlea

cochlea
n.
the spiral organ of the labyrinth of the ear, which is concerned with the reception and analysis of sound. As vibrations pass from the middle ear through the cochlea, different frequencies cause particular regions of the basilar membrane to vibrate: high notes cause vibration in the region nearest the middle ear; low notes cause vibration in the region nearest the tip of the spiral. The organ of Corti, which lies within a central triangular membrane-bound canal (scala media or cochlear duct), contains sensory hair cells attached to an overlying tectorial membrane . When the basilar membrane vibrates the sensory cells become distorted and send nerve impulses to the brain via the cochlear nerve.
Derivatives:
cochlear adj.

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  • Cochlea — Cross section of the cochlea …   Wikipedia

  • Cochlea — Cochlea, Schnecke, in die ⇒ knöcherne Schnecke eingelagerter, ihren Windungen folgender, häutiger Blindsack im Innenohr der Säuger, der in drei Räume geteilt ist: einen mittleren, den von Endolymphe erfüllten Schneckengang (Scala media), der als… …   Deutsch wörterbuch der biologie

  • cochlea — 1680s, spiral cavity of the inner ear, from L. cochlea snail shell, from Gk. kokhlias snail, screw, etc., from kokhlos spiral shell, perhaps related to konkhos mussel, conch …   Etymology dictionary

  • Cochlea — Coch le*a (k[o^]k l[ e]*[.a]), n. [L., a snail, or snail shell, Gr. kochli as a snail, fr. ko chlos a shellfish with a spiral shell.] (Anat.) An appendage of the labyrinth of the internal ear, which is elongated and coiled into a spiral in… …   The Collaborative International Dictionary of English

  • Cochlĕa — (lat.), 1) Schnecke, daher Cochlearium, Behältniß, in dem die zu verspeisenden Schnecken gemästet wurden; 2) Wasserschraube, bes. C. Archimedis; 3) Schneckenwendeltreppe; 4) C. auris (Anat.), Ohrschnecke, s. Ohr …   Pierer's Universal-Lexikon

  • Cochlĕa — (lat.), die Schnecke im Ohr (s.d.); Cochleae, die gehäusetragenden Schnecken …   Meyers Großes Konversations-Lexikon

  • cochlea — ► NOUN (pl. cochleae) ▪ the spiral cavity of the inner ear, containing an organ which produces nerve impulses in response to sound vibrations. DERIVATIVES cochlear adjective. ORIGIN Latin, snail shell or screw , from Greek kokhlias …   English terms dictionary

  • cochlea — [käk′lē ə, kōk′lē ə] n. pl. cochleae [käk′lē ē΄] or cochleas [ModL < L < Gr kochlias, snail, snail shell < kochlos, shellfish; akin to konchē: see CONCH] the spiral shaped part of the inner ear, containing the cochlear nerve endings: see …   English World dictionary

  • Cochlea — Ausguss eines menschlichen Labyrinths Die Hörschnecke (lat. Cochlea) ist ein Teil des Innenohrs und stellt das Rezeptorfeld für die Hörwahrnehmung dar. Inhaltsverzeichnis 1 Aufbau der Hörschnecke …   Deutsch Wikipedia

  • cochlea — A conical cavity in the petrous portion of the temporal bone, forming one of the divisions of the labyrinth or internal ear. It consists of a spiral canal making two and a half turns around a central core of spongy bone …   Medical dictionary

  • COCHLEA — I. COCHLEA Graece κόχλος, ex Hebr. thachla, unde Graeci κάχλη et κάλχη, pro purpura, hincque κόχλος et κογχύλιον, sepeciatim de purpuraria concha, sormaverunt. Perictyone Pythagorica, l. de Concinnitate mul. Διφᾶςθαι εἵματα ἐοικότα λίην καὶ… …   Hofmann J. Lexicon universale

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