Marzi C A, Smania N, Martini M C, Gambina G, Tomelleri G, Palamara A, Alessandrini F, Prior M
Dipartimento di Scienze Neurologische e della Visione-Sezione di Fisiologia, University of Verona, Italy.
Neuropsychologia. 1996 Jan;34(1):9-22. doi: 10.1016/0028-3932(95)00059-3.
Patients with left visual extinction as a result of unilateral right hemisphere damage were tested on a redundant-targets effect paradigm (RTE). LED-generated brief flashes were lateralized either to the left or to the right visual hemifield or presented bilaterally. Subjects were asked to press a key as fast as possible following either unilateral or bilateral stimuli and immediately afterwards to report on the number of stimuli presented. As previously found in normal subjects, bilateral stimuli were responded to faster than unilateral ones, and this was evidence of a RTE. The main thrust of this study was that extinction patients showed a RTE not only for correctly perceived bilateral stimuli but also in trials in which they extinguished the stimulus on the field contralateral to the lesion. This result is compatible with a preserved processing of the extinguished input at least up to the stage at which it may interact with the input from the normal side to yield a speeded motor response. Interestingly, the implicit redundancy gain of extinction patients was found to fit a coactivation (i.e. neural) rather than a probabilistic model.
对因右侧半球单侧损伤而导致左侧视觉消退的患者进行了冗余目标效应范式（RTE）测试。发光二极管产生的短暂闪光分别出现在左侧或右侧视野半侧，或者双侧呈现。要求受试者在单侧或双侧刺激后尽快按键，并在之后立即报告呈现的刺激数量。正如之前在正常受试者中发现的那样，双侧刺激的反应速度比单侧刺激快，这是冗余目标效应的证据。本研究的主要要点是，消退患者不仅在正确感知双侧刺激时表现出冗余目标效应，而且在他们消除损伤对侧视野刺激的试验中也表现出该效应。这一结果与至少在消退输入可能与正常侧输入相互作用以产生快速运动反应的阶段之前，对消退输入的处理得以保留相一致。有趣的是，发现消退患者的内隐冗余增益符合共激活（即神经）模型而非概率模型。
