Progress in the study of time-frequency information perception of Rana Xianqin

Sound communication is very important for the survival and reproduction of vocal animals Animal voice signals encode the key information needed for communication, and the role of time-domain information and frequency-domain information is different in different species, that is, the contribution of the two information modes is asymmetric and species-specific But little is known about how the auditory system represents this difference in contribution Fan Yanzhu, Fang Guangzhan and others from the animal behavior and bionics project group of Chengdu Institute of biology, Chinese Academy of Sciences Daunchina) as the object, electrodes (cerebellum as a reference) were implanted on the left and right sides of the telencephalon, diencephalon and midbrain The oddball experimental paradigm was adopted to play the white noise, the original advertising call, the time domain information retention Version (fill the time domain envelope of the original advertising call with white noise), the frequency domain information retention Version (each syllable of the original advertising call is inverted on the time axis ）The EEG signals were collected and averaged to obtain the event-related potentials (ERPs) data The components of auditory ERPs mainly include N1, P2 and P3, which respectively represent the different processes of sound information processing in the brain Among them, N1 is related to selective attention, P2 is related to the physical properties and familiarity of signals, P3 is related to the classification and novelty of stimuli Researchers predict that the more important information (time-domain information or frequency-domain information) in voice communication will induce ERP components that are more similar to the original advertising tweets The results showed that: (1) compared with the time-domain version, the frequency-domain version induced ERP components more similar to the original advertising calls, which indicated that the auditory nervous system of Rana Xianqin preferred to process the frequency-domain information of the same kind of calls, suggesting that the frequency-domain information may play a more important role in sound communication; (2) compared with the female, the original advertising calls were induced in the male A higher P3 was found to confirm the existence of type II auditory perception The research was supported by the National Natural Science Foundation of China (No 31672305; 31372217) The results were published on Frontiers in zoology (fan et al., Frontiers in zoology, 2019, 16:13).