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The role of the hippocampus in object discrimination based on visual features

机译：海马在基于视觉特征的对象歧视中的作用

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摘要

The role of rodent hippocampus has been intensively studied in different cognitive tasks. However, its role in discrimination of objects remains controversial due to conflicting findings. We tested whether the number and type of features available for the identification of objects might affect the strategy (hippocampal-independent vs. hippocampal-dependent) that rats adopt to solve object discrimination tasks. We trained rats to discriminate 2D visual objects presented on a computer screen. The objects were defined either by their shape only or by multiple-features (a combination of filling pattern and brightness in addition to the shape). Our data showed that objects displayed as simple geometric shapes are not discriminated by trained rats after their hippocampi had been bilaterally inactivated by the GABA(A)-agonist muscimol. On the other hand, objects containing a specific combination of non-geometric features in addition to the shape are discriminated even without the hippo campus. Our results suggest that the involvement of the hippocampus in visual object discrimination depends on the abundance of object's features.
机译：啮齿动物海马的作用在不同的认知任务中被密集地研究。然而，由于调查结果相互冲突，它在对物体的歧视中的作用仍存在争议。我们测试了可用于识别物体的可用功能的数量和类型可能会影响大鼠采用对象歧视任务的策略（Himpy-Indument与海马依赖的）。我们培训了大鼠以区分在计算机屏幕上呈现的2D视觉对象。这些物体仅通过它们的形状或多个特征（除了形状之外的填充图案和亮度的组合）定义。我们的数据显示，由于GABA（a）的血管异常灭活后，培训的大鼠未被培训的大鼠歧视显示为简单的几何形状的物体。另一方面，即使没有河马校园，也可以识别包含除了形状之外的非几何特征的特定组合的对象。我们的研究结果表明，海马在视觉对象歧视中的参与取决于对象特征的丰富。

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