Distinct classes of low frequency ultrasonic vocalizations in rats during sexual interactions relate to different emotional states
Distinct classes of low frequency ultrasonic vocalizations in rats during sexual interactions relate to different emotional states
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DOI：
10.21307/ane-2019-001
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发表时间：
2019-01-01
影响因子：
1.4
通讯作者：
Sajdel-Sulkowska, Elzbieta M.
中科院分区：
文献类型：
--
作者：
Bialy, Michal;Podobinska, Martyna;Sajdel-Sulkowska, Elzbieta M.
本研究研究了大鼠在射精后间隔期（PEI）和非接触屏障（NC）两种性行为中的低频超声发声（IUSVs）。我们报告了不同类别的iusv，可以分配到不同的情绪状态；放松vs.沮丧。在射精后的放松状态下，观察到完全平坦的22 khz叫声（A级）；在PEI期间以固定或修饰为特征。另一方面，2 - 3分量iusv （B类）从更高的频率（45 khz：平坦，向上或短信号）开始，然后转移到35-23 khz（主要是28-23 khz），对应于我们假设的唤醒和沮丧-在NC测试期间嗅探洞或探索相关的活跃状态。我们认为，在沮丧状态下，短暂的、突然的觉醒减少对应于B类iusv。对双分量iusv的高频分量进行详细的频谱分析对于建立这种iusv与相应的行为和情绪状态之间的关系至关重要。我们的研究表明，虽然双分量B类22 khz IUSV可能与挫折状态有关，但单分量，平坦的a类IUSV与松弛状态有关。这些研究的结果支持了一个观点，即老鼠发出独特的发声模式，反映了它们的情绪状态。
This study examined low-frequency ultrasonic vocalizations (IUSVs) in rats during two types of sexual interactions: postejaculatory interval (PEI) and barrier - noncontact (NC) test. We report distinct classes of IUSVs that can be assigned to different emotional states; relaxation vs. frustration. Totally flat, 22-kHz calls (Class A), were observed during the relaxation state following ejaculation; characterized by immobilization or grooming during the PEI. On the other hand, two-three component IUSVs (Class B) that start at a higher frequency (45-kHz: flat, upward or short signal) and then shift to 35-23-kHz (mostly to 28-23-kHz), correspond as we assume, to arousal and frustration - active states associated with sniffing a hole or exploration during the NC test. We suggest that momentary, abrupt decreases of arousal during the frustration state correspond to Class B IUSVs. The detailed spectral analysis of the high-frequency component of two-component IUSVs is crucial for establishing the relationship between such IUSVs and the corresponding behavior and emotional states. Our studies indicate that while the two-component Class B 22-kHz IUSVs may relate to the frustration state, a single component, flat, Class A IUSV relates to the relaxation state. The results of these studies support a notion that rats emit distinct vocalization patterns, reflecting their emotional states.