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- W1978216649 abstract "The auditory cortex of the mustached bat, Pteronotus parnellii, has a highly specialized region, the DSCF (Doppler-shift constant frequency) area, which overrepresents the frequencies of Doppler-shifted echoes (about 61 kHz), and, hence, may play a role in the fine frequency discrimination necessary for detailed velocity measurements (Suga, 1984). This function of the DSCF area was behaviorally tested using reversible ablation with muscimol, a potent GABA agonist (Hilosaka et al., 1985). Bats were trained on a discriminated shock avoidance task requiring a leg flexion response. The stimuli were trains of artificial pulse-echo pairs (tone bursts). For S +, the pulse and echo were the same frequency (e.g., 61.0 kHz), while, for S −, they were different frequencies (e.g., 61.0 and 61.1 kHz). Following baseline testing, 0.1–0.2 μℓ of muscimol (1 μg/μℓ saline) was bilaterally applied to the DSCF area. The bats failed on previously successful discriminations of small frequency differences (e.g., 50 Hz), but succeeded on discriminations of large frequency differences (e.g., 2 kHz). Discrimination performance returned to baseline levels within 24 h. These data indicate that the DSCF area is necessary for fine frequency discriminations involving biosonar signals. [Work supported by AFOSR Grant No. 8743250.]" @default.
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- W1978216649 date "1989-11-01" @default.
- W1978216649 modified "2023-09-25" @default.
- W1978216649 title "Functional involvement of auditory cortex in fine frequency discrimination of biosonar signals in the bat" @default.
- W1978216649 doi "https://doi.org/10.1121/1.2027768" @default.
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