Li Bing, Lowe Kaleb, Chandra Samarth, Chen Gang, Eldridge Mark A G, Richmond Barry J
Laboratory of Neuropsychology, National Institute of Mental Health, National Institutes of Health, Bethesda, MD, United States.
Scientific and Statistical Computing Core, National Institute of Mental Health, National Institutes of Health, Bethesda, MD, United States.
Front Behav Neurosci. 2024 Nov 21;18:1481478. doi: 10.3389/fnbeh.2024.1481478. eCollection 2024.
In real-world vision, objects may appear for a short period, such as in conjunction with visual search. Presumably, this puts a premium on rapid categorization. We designed a visual categorization task cued by briefly presented images to study how visual categorization is processed in an ethologically relevant context. We compared the performance of monkeys with bilateral area TE lesions, and those with bilateral rhinal cortex lesions, to control animals. TE lesions impaired the accuracy but not the speed of visual categorization. In contrast, rhinal cortex lesions did not affect the accuracy but reduced the speed of visual categorization. A generalized drift-diffusion model (GDDM) with collapsing bounds was fitted to the data. The drift rate was equivalent across all groups, but the decision bounds collapsed more slowly in the rhinal group than in the other two groups. This suggests that, although evidence is accumulated at the same rate in all groups, the rhinal lesion results in slower decision-making.
在现实世界的视觉中，物体可能仅短暂出现，比如在视觉搜索过程中。据推测，这使得快速分类变得尤为重要。我们设计了一项由短暂呈现的图像提示的视觉分类任务，以研究在与行为学相关的情境中视觉分类是如何进行处理的。我们将双侧颞下回（TE）受损的猴子以及双侧鼻周皮质受损的猴子的表现与对照动物进行了比较。TE损伤损害了视觉分类的准确性，但并未影响其速度。相比之下，鼻周皮质损伤并未影响准确性，但降低了视觉分类的速度。我们将具有边界收缩的广义漂移扩散模型（GDDM）拟合到数据中。所有组的漂移率是相同的，但鼻周皮质损伤组的决策边界收缩速度比其他两组更慢。这表明，尽管所有组积累证据的速度相同，但鼻周皮质损伤会导致决策速度变慢。
