Auditory Efferent System Modulates Mosquito Hearing

The performance of vertebrate ears is controlled by auditory efferents that originate in the brain and innervate the ear, synapsing onto hair cell somata and auditory afferent fibers [1-3]. Efferent activity can provide protection from noise and facilitate the detection and discrimination of sound b...

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Vydáno v:Current biology Ročník 26; číslo 15; s. 2028
Hlavní autoři: Andrés, Marta, Seifert, Marvin, Spalthoff, Christian, Warren, Ben, Weiss, Lukas, Giraldo, Diego, Winkler, Margret, Pauls, Stephanie, Göpfert, Martin C
Médium: Journal Article
Jazyk:angličtina
Vydáno: England 08.08.2016
Témata:
Animals
Arthropod Antennae - ultrastructure
Auditory Pathways
Culex - physiology
Culex - ultrastructure
Female
Hearing
Male
Microscopy, Electron, Transmission
Sensory Receptor Cells - physiology
ISSN:1879-0445, 1879-0445
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Shrnutí:The performance of vertebrate ears is controlled by auditory efferents that originate in the brain and innervate the ear, synapsing onto hair cell somata and auditory afferent fibers [1-3]. Efferent activity can provide protection from noise and facilitate the detection and discrimination of sound by modulating mechanical amplification by hair cells and transmitter release as well as auditory afferent action potential firing [1-3]. Insect auditory organs are thought to lack efferent control [4-7], but when we inspected mosquito ears, we obtained evidence for its existence. Antibodies against synaptic proteins recognized rows of bouton-like puncta running along the dendrites and axons of mosquito auditory sensory neurons. Electron microscopy identified synaptic and non-synaptic sites of vesicle release, and some of the innervating fibers co-labeled with somata in the CNS. Octopamine, GABA, and serotonin were identified as efferent neurotransmitters or neuromodulators that affect auditory frequency tuning, mechanical amplification, and sound-evoked potentials. Mosquito brains thus modulate mosquito ears, extending the use of auditory efferent systems from vertebrates to invertebrates and adding new levels of complexity to mosquito sound detection and communication.
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content type line 23
ISSN:1879-0445
1879-0445
DOI:10.1016/j.cub.2016.05.077