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Physiological correlates for categorical perception of species-specific communication sounds of Mongolian gerbils: Mismatch negativity in the auditory evoked potential

2012; Frontiers Media; Volume: 6; Linguagem: Inglês

10.3389/conf.fnbeh.2012.27.00249

1662-5153

Riquimaroux Hiroshi,

Marine animal studies overview

Event Abstract Back to Event Physiological correlates for categorical perception of species-specific communication sounds of Mongolian gerbils: Mismatch negativity in the auditory evoked potential Yuki Torigoe1, Kohta I. Kobayasi2 and Hiroshi Riquimaroux2, 3* 1 Doshisha University, Depertment of Biomedical Engineering and Biomedical Information, Graduate School of Life and Medical Sciences , Japan 2 Doshisha University, Department of Biomedical Information, Japan 3 Doshisha University, Department of Biomedical Engineering and Biomedical Information, Graduate school of Life and Medical Sciences, Japan Mongolian gerbils vocally communicate with each other. Most of their sounds are frequency modulated (FM) which can be classified into eight distinct types by frequency and duration. In human, categorical perception has been reported to be important for vocal communication, speech perception. It is likely that categorical perception is also important for animals in processing communication signals. In categorical perception, the equal amount of difference within the same category is perceived less distinctly than the same difference across different categories. This study used Mismatch negativity (MMN) in the auditory evoked potential (AEP) for measuring the perceptual differences in gerbils. The MMN is a neurophysiological response to oddness (e.g., changed in amplitude or frequency in auditory stimuli). If the animals use categorical perception in their vocal communication, MMN amplitude corresponding to a change within the same category is expected to be much smaller than that across categories. This study tested a hypothesis that MMN generated from same type of communication sounds is smaller than that from communication and non-communication sounds. Five adult Mongolian gerbils were implanted an electrode on the midline at 1 mm caudal to bregma on the dura for measuring AEP in free moving condition. Sound stimuli used in this study were synthesized by mimicking “greeting call” of gerbil’s vocal repertory. The greeting call is an upward FM sound; the frequency sweeps from 29 kHz up to 34 kHz with duration about 34 ms. This study used stimuli of upward FMs (29 – 34 kHz and 31 – 36 kHz) as quasi-communication sounds regarded as in the same category. This study also used 40 – 47 kHz FM sound as control to be regarded as a non-greeting call because the frequency was out of their normal communication range. These three types of upward FM sounds were temporally reversed to create non-greeting call. All stimuli used in this study belonged to audible range in gerbils. Durations of all stimuli were fixed at 34 ms. One stimulus set consisted of 9 “standards” followed by 1 “deviant”. Each response was averaged 100 times. In the case of upward FM sound, we used FM stimulus of 29 – 34 kHz (quasi-communication) as “standard” while other two types as “deviant”. Under the conditions of downward FM sounds, 34 – 29 kHz FM sound served as “standard” while other two types were used for “deviant”. To compare the amplitude of MMN, we calculated integrated sum of AEP difference between “deviant” and “standard” conditions (AEP latency were 0 – 50 ms after stimulus offset). As a result, in comparison between upward FM sounds, the MMN amplitude in the middle latency range (0-50 ms) of AEP computed within the same communication category was smaller than the amplitude between quasi-communication sound and non-greeting call. The MMN amplitudes generated from different types of downward FM, all of which were regarded as non-greeting call, were larger than the MMN between quasi-communication sounds. The findings suggest that gerbils may categorize their species-specific communication sounds. Keywords: auditory evoked potential, greeting call Conference: Tenth International Congress of Neuroethology, College Park. Maryland USA, United States, 5 Aug - 10 Aug, 2012. Presentation Type: Poster (but consider for student poster award) Topic: Communication Citation: Torigoe Y, Kobayasi KI and Riquimaroux H (2012). Physiological correlates for categorical perception of species-specific communication sounds of Mongolian gerbils: Mismatch negativity in the auditory evoked potential. Conference Abstract: Tenth International Congress of Neuroethology. doi: 10.3389/conf.fnbeh.2012.27.00249 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 30 Apr 2012; Published Online: 07 Jul 2012. * Correspondence: Prof. Hiroshi Riquimaroux, Doshisha University, Department of Biomedical Engineering and Biomedical Information, Graduate school of Life and Medical Sciences, Kyotanabe, Kyoto, 610-0321, Japan, hrikimar@mail.doshisha.ac.jp Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. 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