Production of regular rhythm induced by external stimuli in rats
Production of regular rhythm induced by external stimuli in rats
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DOI：
10.1007/s10071-021-01505-4
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发表时间：
2021-03-22
期刊：
影响因子：
2.7
通讯作者：
Okanoya, Kazuo
中科院分区：
文献类型：
--
作者：
Katsu, Noriko;Yuki, Shoko;Okanoya, Kazuo
节奏能力对于动物日常生活中群体成员之间的运动、沟通和协调非常重要。我们的目的是检查大鼠在亚秒到几秒范围内的节律感知和生产能力。我们训练大鼠对以六个时间间隔（0.5-2 秒）的规则、同步节律呈现的视听刺激做出反应。六只老鼠中有五只成功地学会了对连续刺激做出反应。所有受试者都表现出周期性动作。在中等节奏条件下，对规则刺激的反应比随机呈现的刺激要快。在较慢和较快的节奏条件下，某些受试者的动作与刺激不具有周期性或相位匹配。当序列的最后一个刺激以偏离的时间呈现时，关于刺激开始的异步性变得更大或更小。因此，老鼠的动作与正常节奏相匹配，但并不完全是预期的。我们还比较了间隔条件下的相位匹配程度和节律产生的变异性。在间隔时间超过 1.5 秒的情况下，变异性往往会更大。总之，大鼠在一定程度上表现出对规则节律的节奏匹配能力，但在较慢的节律条件下维持恒定的节奏是困难的。我们的研究结果表明，非声音学习哺乳动物有可能在亚秒级的时间内产生灵活的节奏。
Rhythmic ability is important for locomotion, communication, and coordination between group members during the daily life of animals. We aimed to examine the rhythm perception and production abilities in rats within the range of a subsecond to a few seconds. We trained rats to respond to audio-visual stimuli presented in regular, isochronous rhythms at six time-intervals (0.5-2 s). Five out of six rats successfully learned to respond to the sequential stimuli. All subjects showed periodic actions. The actions to regular stimuli were faster than randomly presented stimuli in the medium-tempo conditions. In slower and faster tempo conditions, the actions of some subjects were not periodic or phase-matched to the stimuli. The asynchrony regarding the stimulus onset became larger or smaller when the last stimulus of the sequence was presented at deviated timings. Thus, the actions of the rats were tempo matched to the regular rhythm, but not completely anticipative. We also compared the extent of phase-matching and variability of rhythm production among the interval conditions. In interval conditions longer than 1.5 s, variability tended to be larger. In conclusion, rats showed a tempo matching ability to regular rhythms to a certain degree, but maintenance of a constant tempo to slower rhythm conditions was difficult. Our findings suggest that non-vocal learning mammals have the potential to produce flexible rhythms in subsecond timing.