DSBTA, Section of Human Physiology, University of Ferrara, Italy.
Brain Lang. 2011 Jul;118(1-2):9-14. doi: 10.1016/j.bandl.2011.02.007. Epub 2011 Mar 31.
Speech production can be broadly separated into two distinct components: Phonation and Articulation. These two aspects require the efficient control of several phono-articulatory effectors. Speech is indeed generated by the vibration of the vocal-folds in the larynx (F0) followed by ''filtering" by articulators, to select certain resonant frequencies out of that wave (F1, F2, F3, etc.). Recently it has been demonstrated that the motor representation of articulators (lips and tongue) participates in the discrimination of articulatory sounds (lips- and tongue-related speech sounds). Here we investigate whether the results obtained on articulatory sounds discrimination could be extended to phonation by applying a dual-pulse TMS protocol while subjects had to discriminate F0-shifted vocal utterances [a]. Stimulation over the larynx motor representation, compared to the control site (tongue/lips motor cortex), induced a reduction in RT for stimuli including a subtle pitch shift. We demonstrate that vocal pitch discrimination, in analogy with the articulatory component, requires the contribution of the motor system and that this effect is somatotopically organized.
发声和发音。这两个方面都需要对几个发音器官效应器进行有效的控制。言语确实是由喉部的声带振动（基频 F0）产生的，然后由发音器官进行“滤波”，从而从该波中选择出某些共振频率（F1、F2、F3 等）。最近的研究表明，发音器官（唇和舌）的运动表现参与了发音的辨别（唇音和舌音相关的语音）。在这里，我们通过应用双脉冲 TMS 方案来研究这些在发音器官辨别中获得的结果是否可以扩展到发声上，在这个方案中，当受试者必须辨别 F0 移位的发声时[1]。与控制部位（舌/唇运动皮层）相比，刺激喉部运动代表区会导致包括微妙音高变化的刺激的 RT 降低。我们证明了与发音部分类似，音调辨别需要运动系统的贡献，并且这种影响是按照身体部位组织的。
