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首页> 外文期刊>The American journal of otology >Origins of the short latency vestibular evoked potentials (VsEPs) to linear acceleration impulses.
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Origins of the short latency vestibular evoked potentials (VsEPs) to linear acceleration impulses.

机译：线性潜伏脉冲的短潜伏期前庭诱发电位（VsEPs）的起源。

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OBJECTIVE: To verify the vestibular origin of the short latency (t < 12.5 msec) vestibular evoked potentials (VsEPs) in response to linear acceleration impulses (L-VsEPs) and to differentiate between the contributions of the otolith organs and the semi-circular canals (SCCs) to their initiation. DESIGN AND METHODS: L-VsEPs (stimulus intensity, 3 g; rise time, 1.0 to 1.5 msec) were recorded in fat sand rats (Psammomys obesus) before and after unilateral labyrinthectomy, plugging of the SCCs in the remaining ear, and bilateral labyrinthectomy. Auditory nerve brainstem evoked responses (ABRs) and VsEPs to angular acceleration impulses (A-VsEPs) were also recorded. Wave amplitudes and latencies were statistically analyzed (MANOVA, repeated t-tests). RESULTS: In the intact animal, the linear VsEPs consisted of 5 to 6 waves, several mV in amplitude, with short latencies. The latency of the first wave was 2.0 msec. These waves were abolished after bilateral labyrinthectomy. Before and after plugging of the SCCs, linear acceleration VsEP wave latencies did not change, although amplitudes were slightly reduced. Similar results were obtained with respect to ABRs recorded from the same ear. Angular acceleration VsEPs were abolished after SCC plugging. CONCLUSIONS: These and other results confirm that the linear VsEPs are compound action potentials of the vestibular pathway, the first wave is the response of the vestibular nerve, and they are initiated mainly in the otolith organs.
机译：目的：验证响应线性加速度脉冲（L-VsEPs）的短潜伏期（t ​​<12.5毫秒）前庭诱发电位（VsEPs）的前庭起源，并区分耳石器官和半规管的贡献（SCC）。设计与方法：在单侧迷路切除术之前，之后，剩余耳朵中的SCC堵塞以及双侧迷路切除术之前和之后，在肥沙大鼠（Psammomys obesus）中记录了L-VsEP（刺激强度，3 g;上升时间，1.0至1.5毫秒）。 。还记录了听觉神经脑干诱发反应（ABRs）和VsEP对角加速度脉冲（A-VsEPs）的影响。对波幅和潜伏期进行统计分析（MANOVA，重复t检验）。结果：在完整的动物中，线性VsEP由5至6个波组成，振幅为几mV，且潜伏期短。第一波的等待时间为2.0毫秒。这些波在双侧迷路切除术后被消除。在插入SCC之前和之后，尽管振幅略有减小，但线性加速度VsEP波潜伏期没有变化。对于从同一只耳朵记录的ABR，获得了相似的结果。 SCC堵塞后，角加速度VsEP被取消。结论：这些和其他结果证实线性VsEPs是前庭途径的复合动作电位，第一波是前庭神经的反应，并且主要在耳石器官中引发。

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