Sigala Natasha
MRC-Cognition and Brain Sciences Unit, 15 Chaucer Road, CB2 2EF, Cambridge, UK.
Behav Brain Res. 2004 Feb 4;149(1):1-7. doi: 10.1016/s0166-4328(03)00224-9.
We investigated the effects of categorization on the representation of stimulus features in combined psychophysical-electrophysiological experiments. We used parameterized line drawings of faces and fish as stimuli, and we varied the relevance of the different features for the categorization task. The psychophysical and electrophysiological data support an exemplar-based framework for visual object recognition. We recorded from visual neurons in the anterior inferior temporal (IT) cortex of macaque monkeys, while they were performing a categorization task. The visual neurons did not respond selectively to one stimulus set, or to one category. The majority of the anterior IT feature selective neurons were tuned for features that were diagnostic for the categorization task. We argue that this fine-tuning of the neurons reflects the perceptual sensitization to the diagnostic features.
我们在联合心理物理学-电生理学实验中研究了分类对刺激特征表征的影响。我们使用面部和鱼类的参数化线条图作为刺激物，并改变不同特征与分类任务的相关性。心理物理学和电生理学数据支持基于范例的视觉物体识别框架。我们在猕猴的前颞下（IT）皮质的视觉神经元执行分类任务时进行记录。视觉神经元并未对一组刺激或一个类别有选择性地做出反应。大多数前IT特征选择性神经元针对对分类任务具有诊断性的特征进行了调谐。我们认为神经元的这种微调反映了对诊断性特征的感知敏化。
