Physics Department, FCEyN, University of Buenos Aires, Buenos Aires, Argentina.
IFIBA, CONICET, Buenos Aires, Argentina.
Eur J Neurosci. 2022 Jan;55(2):549-565. doi: 10.1111/ejn.15552. Epub 2022 Jan 4.
How vocal communication signals are represented in the cortex is a major challenge for behavioural neuroscience. Beyond a descriptive code, it is relevant to unveil the dynamical mechanism responsible for the neural representation of auditory stimuli. In this work, we report evidence of synchronous neural activity in nucleus HVC, a telencephalic area of canaries (Serinus canaria), in response to auditory playback of the bird's own song. The rhythmic features of canary song allowed us to show that this large-scale synchronization was locked to defined features of the behaviour. We recorded neural activity in a brain region where sensorimotor integration occurs, showing the presence of well-defined oscillations in the local field potentials, which are locked to song rhythm. We also show a correspondence between local field potentials, multiunit activity and single unit activity within the same brain region. Overall, our results show that the rhythmic features of the vocal behaviour are represented in a telencephalic region of canaries.
声音交流信号在大脑皮层中是如何被表示的，这是行为神经科学面临的一个主要挑战。除了描述性代码之外，揭示负责听觉刺激的神经表示的动力学机制也很重要。在这项工作中，我们报告了在金丝雀（Serinus canaria）的端脑区域 HVC 核中同步神经活动的证据，这是对鸟类自身歌曲的听觉回放的反应。金丝雀歌曲的节奏特征使我们能够表明这种大规模同步锁定了行为的定义特征。我们在一个发生感觉运动整合的脑区记录神经活动，显示局部场电位中存在定义良好的振荡，这些振荡与歌曲节奏锁定。我们还在同一脑区的局部场电位、多单位活动和单个单位活动之间显示出对应关系。总的来说，我们的结果表明，鸟类发声行为的节奏特征在金丝雀的端脑区域得到了表示。
