Ito Takayuki, Ostry David J, Gracco Vincent L
Haskins Laboratories; Speech and Cognition Department, Gipsa-lab, CNRS; Univ. Grenoble-Alpes;
Haskins Laboratories; Department of Psychology, McGill University.
J Vis Exp. 2015 Dec 18(106):e53621. doi: 10.3791/53621.
Cortical processing associated with orofacial somatosensory function in speech has received limited experimental attention due to the difficulty of providing precise and controlled stimulation. This article introduces a technique for recording somatosensory event-related potentials (ERP) that uses a novel mechanical stimulation method involving skin deformation using a robotic device. Controlled deformation of the facial skin is used to modulate kinesthetic inputs through excitation of cutaneous mechanoreceptors. By combining somatosensory stimulation with electroencephalographic recording, somatosensory evoked responses can be successfully measured at the level of the cortex. Somatosensory stimulation can be combined with the stimulation of other sensory modalities to assess multisensory interactions. For speech, orofacial stimulation is combined with speech sound stimulation to assess the contribution of multi-sensory processing including the effects of timing differences. The ability to precisely control orofacial somatosensory stimulation during speech perception and speech production with ERP recording is an important tool that provides new insight into the neural organization and neural representations for speech.
由于提供精确且可控的刺激存在困难，与言语中口面部体感功能相关的皮质处理受到的实验关注有限。本文介绍了一种记录体感事件相关电位（ERP）的技术，该技术使用一种新颖的机械刺激方法，即通过机器人设备使皮肤变形。面部皮肤的可控变形用于通过刺激皮肤机械感受器来调节动觉输入。通过将体感刺激与脑电图记录相结合，可以在皮质水平成功测量体感诱发反应。体感刺激可以与其他感觉模态的刺激相结合，以评估多感觉相互作用。对于言语而言，口面部刺激与语音刺激相结合，以评估多感觉处理的贡献，包括时间差异的影响。在言语感知和言语产生过程中，利用ERP记录精确控制口面部体感刺激的能力是一种重要工具，它为言语的神经组织和神经表征提供了新的见解。
