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Science 22 March 1974:
Vol. 183. no. 4130, pp. 1211 - 1213
DOI: 10.1126/science.183.4130.1211
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Articles

Site of Neural Attenuation of Responses to Self-Vocalized Sounds in Echolocating Bats

Nobuo Suga 1 and Tateo Shimozawa 1

1 Department of Biology, Washington University, St. Louis, Missouri 63130

Bats of the genus Myotis emit intense orientation sounds for echolocation. If such sounds directly stimulated their ears, the detection of echoes from short distances would be impaired. In addition to the muscular mechanism in the middle ear, the bat has a neural mechanism in the brain for attenuation of responses to self-vocalized orientation and nonorientation sounds. This neural attenuating mechanism operates in the nucleus of the lateral lemniscus, reducing its activity by about 15 decibels, and it is synchronized with vocalization.


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Science. ISSN 0036-8075 (print), 1095-9203 (online)