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Johnston's organ
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Johnston's organ : ウィキペディア英語版
Johnston's organ
Johnston's organ is a collection of sensory cells found in the pedicel (the second segment) of the antennae in the Class Insecta.〔Kamikouchi A, Inagaki HK, Effertz T, Hendrich O, Fiala A, Göpfert MC, Ito K. (2009).The neural basis of Drosophila gravity-sensing and hearing. Nature. 458(7235):165-71. PMID 19279630〕 Johnston's organ detects motion in the flagellum (third and typically final antennal segment). It consists of scolopidia arrayed in a bowl shape, each of which contains a mechanosensory chordotonal neuron.〔Göpfert MC, Robert D. (2002). (The mechanical basis of Drosophila audition. ) J Exp Biol. 205(Pt 9):1199-208. PMID 11948197〕〔Yack JE. (2004). The structure and function of auditory chordotonal organs in insects. Microsc Res Tech. 63(6):315-37. PMID 15252876〕 The number of scolopidia varies between species. In homopterans, the Johnston’s organs contain 25 - 79 scolopidia. The presence of Johnston's organ is a defining characteristic which separates the Class Insecta from the other hexapods belonging to the group Entognatha. Johnston's organ was named after the physician Christopher Johnston,〔(Johnston, C. ). Auditory Apparatus of the Culex Mosquito. Quarterly Journal of Microscopical Science, 1855, 3 (Old Series):97-102.〕 father of the physician and Assyriologist Christopher Johnston.
== Uses of the Johnston's Organ ==


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