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A human memory circuit derived from brain lesions causing amnesia.


ABSTRACT: Human memory is thought to depend on a circuit of connected brain regions, but this hypothesis has not been directly tested. We derive a human memory circuit using 53 case reports of strokes causing amnesia and a map of the human connectome (n?=?1000). This circuit is reproducible across discovery (n?=?27) and replication (n?=?26) cohorts and specific to lesions causing amnesia. Its hub is at the junction of the presubiculum and retrosplenial cortex. Connectivity with this single location defines a human brain circuit that incorporates?>?95% of lesions causing amnesia. Lesion intersection with this circuit predicts memory scores in two independent datasets (N1?=?97, N2?=?176). This network aligns with neuroimaging correlates of episodic memory, abnormalities in Alzheimer's disease, and brain stimulation sites reported to enhance memory in humans.

SUBMITTER: Ferguson MA 

PROVIDER: S-EPMC6677746 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature

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A human memory circuit derived from brain lesions causing amnesia.

Ferguson Michael A MA   Lim Chun C   Cooke Danielle D   Darby R Ryan RR   Wu Ona O   Rost Natalia S NS   Corbetta Maurizio M   Grafman Jordan J   Fox Michael D MD  

Nature communications 20190802 1


Human memory is thought to depend on a circuit of connected brain regions, but this hypothesis has not been directly tested. We derive a human memory circuit using 53 case reports of strokes causing amnesia and a map of the human connectome (n = 1000). This circuit is reproducible across discovery (n = 27) and replication (n = 26) cohorts and specific to lesions causing amnesia. Its hub is at the junction of the presubiculum and retrosplenial cortex. Connectivity with this single location define  ...[more]

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