Johnston's organ

Johnston's organ

The Johnson's organ can be seen in Drosophila. It consists of a sail like flagellum which rotates in a structure called the funiculus. This movement causes mechanical movement on the surrounding hairs resulting in a nervous signal propagating. The Johnston's organ reacts between 150-500Hz, essentially for detecting the wing beat frequency in detection of a mate.

The Johnston's organ is a collection of sensory cells found in the pedicel (the second segment) of the antennae in the Class Insecta. The Johnston's organ detects motion in the flagellum (third and typically final antennal segment). The presence of the Johnston's organ is a defining characteristic which separates the Class Insecta from the other hexapods belonging to the group Entognatha.


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  • johnston's organ — ˈjän(t)stənz noun Usage: usually capitalized J Etymology: after Christopher Johnston died 1891 American physician : a sense organ in the second antennal segment of insects that responds to movements of the antennal flagellum and serves as a… …   Useful english dictionary

  • Johnston's organ — /jon steuhnz/, Entomol. a sense organ in the second segment of the antenna of an insect, sensitive to movements of the antenna s flagellum, as when the insect is in flight. [named after Christopher Johnston (d. 1891), American physician] * * * …   Universalium

  • Johnston's organ — (ARTHROPODA: Insecta) A chordotonal organ located in the second segment of the antenna and functioning in sound perception, flight speed indicator or water wave perception …   Dictionary of invertebrate zoology

  • Johnston's organ — noun A collection of sensory cells found in the pedicel of the antennae in the class Insecta …   Wiktionary

  • organ of Johnston — see Johnston s organ …   Dictionary of invertebrate zoology

  • organ of johnston — Usage: usually capitalized J : johnston s organ …   Useful english dictionary

  • Johnston-Organ —   [ dʒɔnstən ; nach dem amerikanischen Arzt Christopher Johnston, ✝1891], bei Insekten ein im zweiten Fühlerglied befindliches, mit einer wechselnden Zahl von stiftführenden Sensillen (Skolopidien) ausgestattetes Sinnesorgan, das durch Bewegungen …   Universal-Lexikon

  • Johnston-Organ — Johnston Organ, Schallsinnesorgan verschiedener Insektengruppen; enthält als Rezeptoren mehrere ⇒ Scolopidien, die bei Mücken am Gelenk zwischen Antennengeißel und 2. Antennenglied liegen; dient u.a. der Geschlechterfindung. Das J. ist ein… …   Deutsch wörterbuch der biologie

  • Christopher Johnston — For other people named Christopher Johnston, see Christopher Johnston (disambiguation). Christopher Johnston, M.D., Ph.D. (December 8, 1856[1]  – June 26, 1914) was an American physician and Assyriologist, a scholar of ancient Mesopotamia.… …   Wikipedia

  • Chordotonal organ — Chordotonal organs are stretch receptor organs in insects and other arthropods[1] They are used to detect the position of the body segments and appendages, or, in tympanal organs, the vibrations caused by sounds. An example for hearing is the… …   Wikipedia

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