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Concussion increases CA1 activity during prolonged inactivity in a familiar environment.


ABSTRACT: Although hippocampal damage plays a key role in impairments after concussion, differences in hippocampal information processing during recovery are unknown. Micro-endoscopic calcium imaging was performed before and after primary blast injury in freely behaving mice in two environments: their familiar home cage and a novel open field. Results show that after concussion CA1 activity increased in the familiar environment in which animals were awake and mostly immobile but was unaltered in a novel environment which the animals actively and constantly explored. As awake immobility parallels cognitive rest, a common treatment for patients, the results imply that prolonged cognitive rest may unwittingly impede concussion recovery.

SUBMITTER: Tummala SR 

PROVIDER: S-EPMC7830810 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature

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Concussion increases CA1 activity during prolonged inactivity in a familiar environment.

Tummala Shanti R SR   Hemphill Matthew A MA   Nam Andrea A   Meaney David F DF  

Experimental neurology 20200817


Although hippocampal damage plays a key role in impairments after concussion, differences in hippocampal information processing during recovery are unknown. Micro-endoscopic calcium imaging was performed before and after primary blast injury in freely behaving mice in two environments: their familiar home cage and a novel open field. Results show that after concussion CA1 activity increased in the familiar environment in which animals were awake and mostly immobile but was unaltered in a novel e  ...[more]

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