Dissociable Contributions of the Medial Parietal Cortex to Recognition Memory

被引:0
|
作者
Koslov, Seth R. [1 ]
Kable, Joseph W. [2 ]
Foster, Brett L. [1 ]
机构
[1] Univ Penn, Perelman Sch Med, Dept Neurosurg, Philadelphia, PA 19104 USA
[2] Univ Penn, Dept Psychol, Philadelphia, PA 19104 USA
来源
JOURNAL OF NEUROSCIENCE | 2024年 / 44卷 / 18期
关键词
fMRI; medial parietal cortex; recognition memory; semantics; POSTERIOR CINGULATE CORTEX; DEFAULT-MODE NETWORK; FUNCTIONAL CONNECTIVITY; EPISODIC MEMORY; CONTEXTUAL ASSOCIATIONS; FRONTOPARIETAL CONTROL; DISTRIBUTED NETWORKS; BRAIN ACTIVITY; FACE PATCH; LONG-AXIS;
D O I
10.1523/JNEUROSCI.2220-23.2024
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Human neuroimaging studies of episodic memory retrieval routinely observe the engagement of specific cortical regions beyond the medial temporal lobe. Of these, medial parietal cortex (MPC) is of particular interest given its distinct functional characteristics during different retrieval tasks. Specifically, while recognition and autobiographical recall tasks are both used to probe episodic retrieval, these paradigms consistently drive distinct spatial patterns of response within MPC. However, other studies have emphasized alternate MPC functional dissociations in terms of brain network connectivity profiles or stimulus category selectivity. As the unique contributions of MPC to episodic memory remain unclear, adjudicating between these different accounts can provide better consensus regarding MPC function. Therefore, we used a precision-neuroimaging dataset (7T functional magnetic resonance imaging) to examine how MPC regions are differentially engaged during recognition memory and how these task-related dissociations may also reflect distinct connectivity and stimulus category functional profiles. We observed interleaved, though spatially distinct, subregions of MPC where responses were sensitive to either recognition decisions or the semantic representation of stimuli. In addition, this dissociation was further accentuated by functional subregions displaying distinct profiles of connectivity with the hippocampus during task and rest. Finally, we show that recent observations of dissociable person and place selectivity within the MPC reflect category-specific responses from within identified semantic regions that are sensitive to mnemonic demands. Together, by examining precision functional mapping within individuals, these data suggest that previously distinct observations of functional dissociation within MPC conform to a common principle of organization throughout hippocampal-neocortical memory systems.
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页数:17
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