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Prefrontal cortex stroke induces delayed impairment in spatial memory.

Lisa Y Y Zhou1, Tim E Wright1, Andrew N Clarkson2

  • 1Department of Anatomy, Brain Health Research Center and Brain Research new Zealand, University of Otago, P.O. Box 913, Dunedin 9054, New Zealand.

Behavioural Brain Research
|August 27, 2015
PubMed
Summary
This summary is machine-generated.

Stroke affecting the prefrontal cortex (PFC) can cause delayed spatial memory deficits in mice. This new animal model may help test cognitive therapies for stroke patients.

Keywords:
Anterior cingulateCognitionObject recognitionSupplementary motor cortex

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Area of Science:

  • Neuroscience
  • Neurology
  • Cognitive Science

Background:

  • Stroke is a primary cause of long-term disability, often leading to cognitive deficits.
  • Subtle cognitive impairments, like those in working memory and attention, are challenging to diagnose and treat.
  • Understanding stroke's impact on cognition is crucial for developing effective interventions.

Purpose of the Study:

  • To establish a focal ischemia model targeting the prefrontal cortex (PFC) in mice.
  • To investigate the effects of PFC stroke on cognitive functions, particularly memory.
  • To determine if PFC stroke induces delayed-onset memory impairments.

Main Methods:

  • A focal ischemia model was induced in the PFC of mice.
  • Stroke and sham mice were evaluated at 1 and 4 weeks post-stroke.
  • Behavioral tests included open-field, grid-walk, cylinder, elevated plus maze, novel-object recognition, and object-location recognition tasks.

Main Results:

  • Stroke mice showed no significant changes in motor function or anxiety levels.
  • No differences in novel-object recognition were observed between stroke and sham mice.
  • Stroke mice exhibited significant impairment in spatial memory (object-location recognition) by 4 weeks post-stroke.

Conclusions:

  • Stroke targeting the prefrontal cortex induces a delayed onset of spatial memory impairment in mice.
  • This PFC stroke model demonstrates a delayed deficit in spatial memory, mirroring human epidemiological findings.
  • The developed model is a valuable tool for evaluating rehabilitative and cognitive therapies for stroke-induced memory deficits.