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首页> 外文期刊>Neuron >Remembrance of odors past: human olfactory cortex in cross-modal recognition memory.
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Remembrance of odors past: human olfactory cortex in cross-modal recognition memory.

机译：过去的气味记忆：跨模式识别记忆中的人类嗅觉皮层。

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Episodic memory is often imbued with multisensory richness, such that the recall of an event can be endowed with the sights, sounds, and smells of its prior occurrence. While hippocampus and related medial temporal structures are implicated in episodic memory retrieval, the participation of sensory-specific cortex in representing the qualities of an episode is less well established. We combined functional magnetic resonance imaging (fMRI) with a cross-modal paradigm, where objects were presented with odors during memory encoding. We then examined the effect of odor context on neural responses at retrieval when these same objects were presented alone. Primary olfactory (piriform) cortex, as well as anterior hippocampus, was activated during the successful retrieval of old (compared to new) objects. Our findings indicate that sensory features of the original engram are preserved in unimodal olfactory cortex. We suggest that reactivation of memory traces distributed across modality-specific brain areas underpins the sensory qualities of episodic memories.
机译：情景记忆通常充满多感官丰富性，因此事件的召回可以赋予事件先前发生的视觉，声音和气味。虽然海马和相关的内侧颞部结构牵涉到情节性记忆检索中，但感觉特异性皮层参与代表发作质量的参与尚不充分。我们将功能磁共振成像（fMRI）与交叉模式范例结合在一起，在该模式下，对象在记忆编码过程中呈现出异味。然后，当这些相同的物体单独出现时，我们检查了气味环境对检索时神经反应的影响。在成功检索旧对象（与新对象相比）时，激活了初级嗅觉（梨状）皮层以及海马前部。我们的发现表明，原始字母的感觉特征保留在单峰嗅觉皮层中。我们建议，重新激活分布在特定于情态的大脑区域的记忆轨迹，可以增强情节性记忆的感觉品质。

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