@article {57564,
	title = {Effect of the Temporal Pattern of Contralateral Inhibition on Sound Localization Cues},
	year = {2005},
	abstract = {<p>We studied the temporal coding properties of identified interneurons in the auditory system of crickets, using information theory as an analytical tool. The ascending neuron 1 (AN1), which is tuned to the dominant carrier frequency (CF) of cricket songs, selectively codes the limited range of amplitude modulation (AM) frequencies that occur in these signals. AN2, which is most sensitive to the ultrasonic frequencies that occur in echolocation calls of insectivorous bats, codes a broader range of AM frequencies, as occur in bat calls. A third neuron, omega neuron 1 (ON1), which is dually tuned to both ranges of carrier frequency, was shown previously to have CF-specific coding properties, allowing it to represent accurately the differing temporal structures of both cricket songs and bat calls. ON1 is a source of contralateral inhibition to AN1 and AN2, enhancing binaural contrast and facilitating sound localization. We used dichotic stimulation to examine the importance of the temporal structure of contralateral inhibition for enhancing binaural contrast. Contralateral inhibition degrades the coding of temporal pattern by AN1 and AN2, but only if the temporal pattern of inhibitory input matches that of excitation. Firing rate is also decreased most strongly by temporally matched contralateral inhibition. This is apparent for AN1 in its mean firing rate; for AN2, high-frequency firing is selectively suppressed. Our results show that the CF-specific coding properties of ON1 allow this single neuron to enhance effectively localization cues for both cricket-like and bat-like acoustic signals.</p>
},
	keywords = {auditory, communication, cricket, information theory, phonotaxis, temporal coding},
	doi = {10.1523/JNEUROSCI.0646-05.2005},
	url = {http://www.jneurosci.org/cgi/doi/10.1523/JNEUROSCI.0646-05.2005},
	author = {Marsat, Gary and Gerald S. Pollack}
}
@article {47772,
	title = {Difference in calling song of three field crickets of the genus Teleogryllus: the role in premating isolation},
	journal = {Animal Behaviour},
	volume = {69},
	year = {2005},
	month = {Jan-04-2005},
	pages = {881 - 889},
	abstract = {<p>Cricket songs are species-specific signals that are important for species recognition. To prove the effectiveness of calling songs in premating isolation, studies need to take into account closely related species distributed sympatrically in nature. I compared the calling songs of three closely related cricket species that inhabit the Japanese archipelago: Teleogryllus yezoemma, T. emma and T. taiwanemma. Teleogryllus emma is widely distributed in the archipelago and overlaps the ranges of T. taiwanemma in the south and T. yezoemma in the north; T. yezoemma and T. taiwanemma are allopatric. I compared three temporal parameters (the long-chirp duration, the interphrase duration and the pulse cycle), a frequency parameter (the dominant frequency) and two structural parameters (the number of pulses in one long chirp and the number of short chirps following one long chirp). In addition, I conducted a two-speaker playback experiment using female T. taiwanemma to test whether they can accurately distinguish conspecific males based on their calling song. The species with partially overlapping ranges had divergent songs that females could distinguish accurately, whereas the allopatric species had similar songs that females could not accurately discriminate. These results suggest that the calling song has an important role as a premating isolation mechanism.</p>
},
	issn = {00033472},
	doi = {10.1016/j.anbehav.2004.05.015},
	url = {http://linkinghub.elsevier.com/retrieve/pii/S000334720400380X},
	author = {Honda-Sumi, Eri}
}
