High vocal center (HVC) can produce single sound with one or two syllables by the sin-gle-type vocal control pattern in songbirds ruddy bunting (Emberiza rutila). It obviously shows left-side dominance in controlling ...High vocal center (HVC) can produce single sound with one or two syllables by the sin-gle-type vocal control pattern in songbirds ruddy bunting (Emberiza rutila). It obviously shows left-side dominance in controlling double syllables, principal frequency (PF) and increasing sound intensity of the evoked calls. Meanwhile, the complex-type control pattern can produce complex calls with multisyllable, and also shows significant left-side dominance in controlling the number of syllables, tone changing and sound intensity. These indicate that left-side HVC controls higher frequency and complicated sentence structure. The basic vocal center, dorsomedial nucleus of the intercollicular complex (DM), controls the monosyllable sound in songbirds, and shows left-side dominance in controlling both the number of syllable and sound intensity. These results not only provide some direct evidence for left-side dominance in high vocal center, but also indicate that there is some internal connection between the high and basic vocal centers in songbirds.展开更多
鸣禽鸟的基本发声中枢--丘间复合体背内侧核(nucleus dorsalis medialis of the intercollicular complex,DM)对叫声的调控模式是诱发单次叫声.应用电生理与声学分析相结合的方法研究鸣禽鸟燕雀(Fringilla montifringilla)DM核团对声音...鸣禽鸟的基本发声中枢--丘间复合体背内侧核(nucleus dorsalis medialis of the intercollicular complex,DM)对叫声的调控模式是诱发单次叫声.应用电生理与声学分析相结合的方法研究鸣禽鸟燕雀(Fringilla montifringilla)DM核团对声音调控的模式.经语图和频谱图分析,结果显示:燕雀左侧DM诱发单次叫声的声长和主能量区的带宽分别为右侧DM诱发叫声的2倍和1.7～3.1倍,提示燕雀DM对叫声声长和声强的调控能力,均呈明显的左侧优势.这与高级发声中枢(high vocal center,HVC)和古纹状体粗核(nucleus robustus archistriatalis,RA)等发声控制核团在控声模式中具有左侧优势的特征相似,从而为鸣禽发声控制通路高、低级中枢具有内源投射关系提供了声学上的证据.展开更多
BACKGROUND Left-dominant arrhythmogenic cardiomyopathy(LDAC)is a relatively rare disease characterized by poor prognosis that exacerbates the incidence of sudden cardiac death and ventricular arrhythmias.Clinically,LD...BACKGROUND Left-dominant arrhythmogenic cardiomyopathy(LDAC)is a relatively rare disease characterized by poor prognosis that exacerbates the incidence of sudden cardiac death and ventricular arrhythmias.Clinically,LDAC is constantly overlooked or misdiagnosed as myocardial infarction,myocarditis,and dilated cardiomyopathy,owing to atypical and nonspecific clinical manifestations at an early stage.CASE SUMMARY A 57-year-old woman was diagnosed with sinus bradycardia and chronic bifascicular block during a health check.She occasionally experienced mild chest pain and paroxysmal palpitation during activity in the past 2 years.Comprehensive auxiliary examinations,including electrocardiogram,echocardiography,coronary computerized tomography angiography,and magnetic resonance imaging,revealed that she had LDAC instead of congenital ventricular diverticulum.The physicians prescribed standard oral therapy for heart failure and implantable cardioverter-defibrillator.Consequently,her left ventricular systolic function and symptoms remained stable at the 2-year follow-up after discharge.CONCLUSION Based on this case,clinicians need to be aware of LDAC in patients with localized left ventricular lesions and multiple electrocardiographic abnormalities.Multimodality cardiovascular imaging is effective in identification of multiple types of cardiomyopathy and cardiac inner structures.展开更多
基金supported by the National Natural Science Foundation of China(Grant No.39570195)Outstanding Youth Foundation of Ministry of Education of China,Science and Technology Research Project of Ministry of Education of China(Grant No.01062)Laboratory of Visual Information Processing Foundation of the Chinese Academy of Sciences.
文摘High vocal center (HVC) can produce single sound with one or two syllables by the sin-gle-type vocal control pattern in songbirds ruddy bunting (Emberiza rutila). It obviously shows left-side dominance in controlling double syllables, principal frequency (PF) and increasing sound intensity of the evoked calls. Meanwhile, the complex-type control pattern can produce complex calls with multisyllable, and also shows significant left-side dominance in controlling the number of syllables, tone changing and sound intensity. These indicate that left-side HVC controls higher frequency and complicated sentence structure. The basic vocal center, dorsomedial nucleus of the intercollicular complex (DM), controls the monosyllable sound in songbirds, and shows left-side dominance in controlling both the number of syllable and sound intensity. These results not only provide some direct evidence for left-side dominance in high vocal center, but also indicate that there is some internal connection between the high and basic vocal centers in songbirds.
基金Supported by Chengdu Science and Technology BureauChina,No.2020-YF05-00290-SN。
文摘BACKGROUND Left-dominant arrhythmogenic cardiomyopathy(LDAC)is a relatively rare disease characterized by poor prognosis that exacerbates the incidence of sudden cardiac death and ventricular arrhythmias.Clinically,LDAC is constantly overlooked or misdiagnosed as myocardial infarction,myocarditis,and dilated cardiomyopathy,owing to atypical and nonspecific clinical manifestations at an early stage.CASE SUMMARY A 57-year-old woman was diagnosed with sinus bradycardia and chronic bifascicular block during a health check.She occasionally experienced mild chest pain and paroxysmal palpitation during activity in the past 2 years.Comprehensive auxiliary examinations,including electrocardiogram,echocardiography,coronary computerized tomography angiography,and magnetic resonance imaging,revealed that she had LDAC instead of congenital ventricular diverticulum.The physicians prescribed standard oral therapy for heart failure and implantable cardioverter-defibrillator.Consequently,her left ventricular systolic function and symptoms remained stable at the 2-year follow-up after discharge.CONCLUSION Based on this case,clinicians need to be aware of LDAC in patients with localized left ventricular lesions and multiple electrocardiographic abnormalities.Multimodality cardiovascular imaging is effective in identification of multiple types of cardiomyopathy and cardiac inner structures.
