鸣鸣蝉（Oncotympana　maculaticollis　Motsch）发声肌动作特性的研究  

A study on action properties of soundingmuscle in Mingming cicada(Oncotympana maculaticollis Motsch)

作　　者：杨新宇[1] 蒋帛昌 陈浩[1] 徐慕玲[1] 

机构地区：[1]中国科学院生物物理研究所

出　　处：《声学学报》1994年第3期216-226,共11页Acta Acustica

基　　金：国家自然科学基金

摘　　要：本文由鸣鸣蝉发声肌的肌电图（ＥＭＧ）与同步鸣声的比较，揭示了其变音调鸣声与发声肌兴奋特性的关系．鸣鸣蝉的两侧发声肌交替收缩，在受控特性上为同步肌．惊鸣过程中发声肌ＥＭＧ的幅值平均为自发活动的２．６倍，宽度多数约增加１ｍｓ．与单峰ＥＭＧ对应的同步叫声第二陪音（ＵＰ２）主峰频率（ＭＰＦ）的幅值平均比双峰ＥＭＧ对应的同步叫声ＵＰＺ的ＭＰＦ约高９ｄＢ．同步叫声的潜伏期平均约为４．５ｍｓ．同时，双峰ＥＭＧ的首峰与第二峰融合后的演变过程中，第二峰的上升速率与首峰幅值呈显著性负相关，即随着首峰幅值的增高，第二峰的上升速率平均以３．４ｍＶ／ｍｓ递降．Electromyograms(EMG) of the sounding muscle (SMc) and the synchro call ofMingming cicada were studied parallelly with the aim to reveal the relationship between itstone-varying song and the excitation property of SMc.In Mingming cicada,the left and right SMc contract alternately,and are the synchronousmuscles in respect of the mode of control. In producing protest songs, the amplitudes. inspontaneous activities,and their pulse widths increase by about 1 ms for the majority. Theamplitudes of the main peak frequencies (MPF) of the second upper partials (UP,) corresponding to the monopeak EMGs in a synchro call are about 9 dB higher in average thanthose of MPFs of UP, corresponding to the dual-peak EMGs. The latent periods of synchrocalls are about 4. 5 ms in average. Moreover, in the process of evolutions of the dual-peak EMGs, a significant negative-correlation between the rising speed of second-peaks andthe amplitude of first-peaks after their fusion is found,i. e. with the increase of amplitudes ofthe first-peak the rising speed of the second-peak decrease with a rate of 3. 4 mV/msin average.

关 键 词：鸣鸣蝉 发声肌 肌电图 同步鸣声 

分 类 号：Q62[生物学—生物物理学]