Department of Psychology, City University London, London, UK.
Psychophysiology. 2011 Jun;48(6):788-96. doi: 10.1111/j.1469-8986.2010.01147.x. Epub 2010 Oct 19.
Mechanisms underlying pure tactile attentional selection were investigated. Tactile imperative stimuli were preceded by symbolic tactile cues directing attention to the left or right (directional cues), or to both hands (non-directional cues). Comparison of ERP waveforms on directional and non-directional cue trials showed that attentional modulations at N140 and P200 components reflect mainly enhancement of stimuli at the attended, while longer latency modulations reflect mainly suppression of processing of stimuli at the unattended location. This pattern of results differs from analogous studies involving other modalities suggesting that different mechanisms underlie pure tactile attention. Furthermore, ERP waveforms on non-directional cue trials were enhanced in comparison to directional cue trials at the P100 component and at longer latencies, indicating that tactile attentional mechanisms may differ when attending to one compared to multiple locations.
研究了纯粹触觉注意力选择的机制。触觉强制性刺激之前有符号触觉提示，提示注意力向左或向右（方向提示），或双手（非方向提示）。对方向提示和非方向提示试验的 ERP 波进行比较表明，N140 和 P200 成分的注意力调制主要反映了对注意到的刺激的增强，而较长潜伏期的调制主要反映了对未注意到的刺激的处理的抑制。这种结果模式与涉及其他模态的类似研究不同，表明纯粹触觉注意力的基础是不同的机制。此外，与方向提示试验相比，非方向提示试验在 P100 成分和较长潜伏期的 ERP 波得到增强，表明当注意力集中在一个位置与多个位置时，触觉注意力机制可能会有所不同。
