分子表現の適応性を活用した統一的な事前学習戦略

분자-표현의-적응성을-통한-통합-사전-학습-전략-adamr

enhancing-the-safety-of-large-language-models-against-sophisticated-jailbreak-attacks-through-intention-analysis

大規模言語モデルの安全性を高める意図分析手法

대규모-언어-모델의-의도-분석을-통한-안전한-수행-방법

iterative-data-driven-control-design-for-unknown-linear-systems-a-system-theoretic-analysis

未知システムに対するデータ駆動型ポリシー反復の役割-システム理論的研究

데이터-기반-정책-반복에서-식별의-역할-시스템-이론적-연구


Reduced or absent visual imagery in aphantasia is associated with impaired retrieval of detail-rich autobiographical memories, reflected by decreased hippocampal activation and altered functional connectivity between the hippocampus and visual-perceptual cortices.


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Aphantasia refers to reduced or absent visual imagery. While most of us can readily recall decade-old personal experiences (autobiographical memories, AM) with vivid mental images, there is a dearth of information about whether the loss of visual imagery in aphantasics affects their AM retrieval. The hippocampus is thought to be a crucial hub in a brain-wide network underlying AM. One important question is whether this network, especially the connectivity of the hippocampus, is altered in aphantasia. In the current study, we tested 14 congenital aphantasics and 16 demographically matched controls in an AM fMRI task to investigate how key brain regions (i.e., hippocampus and visual-perceptual cortices) interact with each other during AM re-experiencing. All participants were interviewed regarding their autobiographical memory to examine their episodic and semantic recall of specific events. Aphantasics reported more difficulties in recalling AM, were less confident about their memories, and described less internal and emotional details than controls. Neurally, aphantasics displayed decreased hippocampal and increased visual-perceptual cortex activation during AM retrieval compared to controls. In addition, controls showed strong negative functional connectivity between the hippocampus and the visual cortex during AM and resting-state functional connectivity between these two brain structures predicted better visualization skills. Our results indicate that visual mental imagery plays an important role in detail-rich vivid AM, and that this type of cognitive function is supported by the functional connection between the hippocampus and the visual-perceptual cortex.

### Competing Interest Statement

The authors have declared no competing interest.

Hippocampal-occipital connectivity reflects autobiographical memory deficits in aphantasia

reduced-visual-imagery-impairs-autobiographical-memory-retrieval-in-aphantasia


Reduced Visual Imagery Impairs Autobiographical Memory Retrieval in Aphantasia


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Autobiographical Memory Deficits in Aphantasia