Ottaviani F, Paludetti G, Grassi S, Draicchio F, Santarelli R M, Serafini G, Pettorossi V E
Institute of Otorhinolaryngology, Catholic University of the Sacred Heart, Rome, Italy.
Audiology. 1990;29(4):212-8. doi: 10.3109/00206099009072852.
The authors have studied auditory brainstem (ABRs), middle latency (MLRs) and steady-state potentials (SSRs) in 15 adult male rabbits weighing between 2.5 and 3 kg in order to verify if SSRs are due to a mere superimposition of ABRs and MLRs or to a resonance phenomenon. Ten of them were awake while 5 were studied under urethane anesthesia. Acoustic stimuli consisted in 0.1-ms square-wave pulses delivered at presentation rates ranging between 1 and 80/s at a stimulus intensity of 80 dB p.e. SPL. Our data show that reliable auditory SSRs can be obtained in the rabbit at a presentation rate of 30 stimuli/s, probably due to the superimposition of ABRs and MLR Pb waves which show an interwave interval of about 35 ms. The nonlinear aspects which can be detected are probably due to the effect of decreasing interstimulus intervals on the duration and amplitude of the Pb wave. It can then be concluded that SSRs in the rabbit are due more to a superimposition of ABR and MLR waves than to a resonance phenomenon.
作者对15只体重在2.5至3千克之间的成年雄性兔子进行了听觉脑干反应（ABR）、中潜伏期反应（MLR）和稳态电位（SSR）研究，以验证SSR是仅仅由于ABR和MLR的叠加，还是由于共振现象。其中10只兔子处于清醒状态，5只在氨基甲酸乙酯麻醉下进行研究。声刺激由0.1毫秒的方波脉冲组成，以1至80次/秒的呈现速率、80分贝等效声压级的刺激强度施加。我们的数据表明，以30次/秒的呈现速率可以在兔子身上获得可靠的听觉SSR，这可能是由于ABR和MLR的Pb波叠加，其波间期约为35毫秒。能够检测到的非线性方面可能是由于刺激间隔缩短对Pb波的持续时间和幅度的影响。因此可以得出结论，兔子的SSR更多是由于ABR和MLR波的叠加，而非共振现象。
