The effect of expectation on facilitation of colour/form conjunction tasks by TMS over area V5
The effect of expectation on facilitation of colour/form conjunction tasks by TMS over area V5
复制标题
DOI：
10.1016/s0028-3932(03)00180-5
复制
发表时间：
2003-01-01
期刊：
影响因子：
2.6
通讯作者：
Walsh, V
中科院分区：
文献类型：
--
作者：
Ellison, A;Battelli, L;Walsh, V
在早期的论文中，我们报道了在皮层视觉区V5上应用TMS所引起的特定任务的损伤和改善[《皇家学会伦敦会议录》B 265（1998）537]。在本研究中，使用两个先前的任务的现象进一步调查：一个运动/形式的连接，其中TMS受损的性能和颜色/形式的连接，其中性能与TMS增强。在早期的实验中，受试者被提供了一个任务类型的试验块，也许允许一些观察到的影响，从知道刺激的类型来区分。当块的试验随机混合移动/形式和颜色/形式连接任务，TMS超过V5仍然损害目标存在的反应，移动/形式连接，但促进颜色/形式连接目标存在的反应消失。我们认为，竞争性抑制假设之间的视觉运动区和颜色区在大脑中，在我们以前的文件，受到预期或即将到来的刺激类型的知识。(C)2003爱思唯尔有限公司。保留所有权利。
In an earlier paper, we reported task-specific impairments and improvements caused by applying TMS over cortical visual area V5 [Proceedings of the Royal Society of London B 265 (1998) 537]. The phenomenon is further investigated in the present study using two of the previous tasks: a motion/form conjunction in which TMS impaired performance and a colour/form conjunction in which performance was enhanced with TMS. In the earlier experiment, subjects were presented with blocks of trials of one task type perhaps allowing some of the observed effects to arise from knowing the type of stimulus to be discriminated. When blocks of trials consisted of randomly mixed moving/form and colour/form conjunction tasks, TMS over V5 still impaired target-present responses for the moving/form conjunction, but the facilitation seen for colour/form conjunction target-present responses disappeared. We suggest that the competitive inhibition postulated between visual movement areas and colour areas in the brain, in our previous paper, are subject to expectation or knowledge of forthcoming stimulus type. (C) 2003 Elsevier Ltd. All rights reserved.