Modulation of frequency-tuning property of subcortical neurons elicited by corticofugal signals in bat’s auditory cortex

Mutoh, Yoshitaka; Nagase, Yoshihiro; Kashimori, Yoshiki

doi:10.1186/1471-2202-12-s1-p231

Cited by 1 publication

(1 citation statement)

References 3 publications

(2 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Frequency analysis by central auditory neurons is a key problem in auditory information processing by echolocating bats that have drawn wide attention from researchers (Casseday and Covey 1992;Mutoh et al 2011;Odendaal et al 2014). Many studies showed that bat echolocation signals generally include two or more harmonics, of which the second harmonic has the highest energy (O'Neill and Suga 1982;Luo et al 2007).…”

Section: Introductionmentioning

confidence: 97%

Effect of echolocation behavior-related constant frequency–frequency modulation sound on the frequency tuning of inferior collicular neurons in Hipposideros armiger

Tang

Wei

et al. 2015

J Comp Physiol A

View full text Add to dashboard Cite

In constant frequency-frequency modulation (CF-FM) bats, the CF-FM echolocation signals include both CF and FM components, yet the role of such complex acoustic signals in frequency resolution by bats remains unknown. Using CF and CF-FM echolocation signals as acoustic stimuli, the responses of inferior collicular (IC) neurons of Hipposideros armiger were obtained by extracellular recordings. We tested the effect of preceding CF or CF-FM sounds on the shape of the frequency tuning curves (FTCs) of IC neurons. Results showed that both CF-FM and CF sounds reduced the number of FTCs with tailed lower-frequency-side of IC neurons. However, more IC neurons experienced such conversion after adding CF-FM sound compared with CF sound. We also found that the Q 20 value of the FTC of IC neurons experienced the largest increase with the addition of CF-FM sound. Moreover, only CF-FM sound could cause an increase in the slope of the neurons' FTCs, and such increase occurred mainly in the lower-frequency edge. These results suggested that CF-FM sound could increase the accuracy of frequency analysis of echo and cut-off low-frequency elements from the habitat of bats more than CF sound.

show abstract