Middle- and long-latency auditory evoked potentials in bottlenose dolphins (Tursiops truncatus) resulting from frequent and oddball stimuli
Middle- and long-latency auditory evoked potentials in bottlenose dolphins (Tursiops truncatus) resulting from frequent and oddball stimuli
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DOI：
10.1578/am.33.1.2007.34
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发表时间：
2007-01-01
期刊：
影响因子：
1.2
通讯作者：
Finneran, James J.
中科院分区：
文献类型：
--
作者：
Hernandez, Erica N.;Kuczaj, Stan;Finneran, James J.
中、长潜伏期听觉诱发电位（AEPs）在海洋哺乳动物中尚未得到广泛研究。由插入一系列重复或“标准”听觉刺激中的不频繁的“古怪”刺激引起的较长潜伏期电位的差异可以潜在地用于检测个体的辨别能力。为了研究由oddball范式引起的诱发反应的特征，AEP记录使用100 ms的纯音作为刺激，并记录AEP的500 ms的epoch从两个短吻海豚（Tursiops truncatus）。当重复该刺激（标准刺激）时，对40 kHz纯音的P50反应减弱，发生概率为80%。然而，当出现30 kHz的古怪音调（发生概率为20%）时，P50反应幅度增加，表明对新刺激的适应性降低。当标准音和奇数音颠倒时（30 kHz标准音; 40 kHz奇数音），观察到P50对标准音反应的衰减。结果表明，感觉门控，习惯于重复的刺激（“门控”）和/或disabitating到一个新的刺激（“门控”）。这些反应中的一个或两个的存在表明，P50反应古怪的刺激有可能表明一组特定的听觉刺激的歧视。
Middle- and long-latency auditory evoked potentials (AEPs) have not been extensively studied in marine mammals. Differences in longer latency potentials resulting from infrequent "oddball" stimuli inserted within a train of repeated, or "standard," auditory stimuli can potentially be used to detect the discrimination ability of an individual. To investigate the characteristics of evoked responses resulting from the oddball paradigm, AEPs were recorded using 100-ms pure tones as stimuli and recording AEP epochs of 500 ms from two bottlenose dolphins (Tursiops truncatus). The P50 response to a 40-kHz pure tone was attenuated when that stimulus was repeated (the standard stimulus), with an 80% probability of occurrence. When a 30-kHz oddball tone was presented (20% probability of occurrence), however, the P50 response amplitude increased, indicating dishabituation to the novel stimulus. The attenuation of the P50 response to the standard tone was observed when the standard and oddball tones were reversed (30-kHz standard; 40-kHz oddball). The results demonstrated sensory gating, either habituating to a repeated stimulus ("gating out") and/or dishabituating to a novel stimulus ("gating in"). The presence of one or both of these responses suggests that the P50 response to oddball stimuli has the potential to indicate discrimination of a particular set of auditory stimuli.