| Abstract: | Characteristics of single unit responses of the cochlear nuclei of greater horseshoe bats to ultrasonic stimuli with a filling frequency within the echolocation range were investigated. In most neurons three unconnected regions of responses were found, with characteristic frequencies equal to 1/2 and 1/3 of the basic frequency, within the range 80–90 kHz. The response regions had inhibitory zones, one of which was higher than the basic characteristic frequency whereas the other two were overlapped by the complementary response regions. Selectivity of the neurons to the frequency of stimulation increased with a change in the characteristic frequency from 90 to 80 kHz; it was maximal in the band 80–80.5 kHz. |
