Objective . We used EEG to investigate cortical oscillatory activities during the tactile discrimination task and characterize the correlation between the EEG features and subjects’ discrimination performance. Approach . Transcutaneous electrical nerve stimulation (TENS) was applied on two finger areas (thumb and index for healthy hands, thumb and index-projected areas for disabled hands) to evoke two kinds of tactile sensations (vibration and pressure) with three levels of intensities (low, medium and high). Four forearm amputees and thirteen able-bodied subjects were recruited to discriminate the specific intensity and area of the applied stimulation. We assessed the discrimination performance [discrimination accuracy rate ( AR ) and response time ( RT )] to quantify the tactile acuity. During the stimulation, EEG signals were recorded and the evoked cortical oscillatory activities were analyzed. Linear regression analyses were performed between EEG feat...

中文翻译：

---

对侧不同步的α振荡与触觉分辨能力线性相关。

目标。我们使用脑电图调查触觉歧视任务期间皮质振荡活动，并表征脑电图特征和受试者的歧视表现之间的相关性。方法。在两个手指区域（健康手的拇指和食指，残疾手的拇指和食指投影区）上施加经皮电神经刺激（TENS），以三种强度（低）产生两种触觉（振动和压力） ，中高）。招募四名前臂截肢者和十三名身体健全的受试者，以区分所施加刺激的具体强度和面积。我们评估了辨别性能[辨别准确率（AR）和响应时间（RT）]以量化触觉敏锐度。在刺激过程中 记录脑电信号并分析诱发的皮层振荡活动。脑电图特征之间进行线性回归分析。