Prefrontal cortex stroke induces delayed impairment in spatial memory
Abstract
Stroke is the leading cause of long-term disability. Little is known about the effects of stroke on cognitive deficits. The subtle nature of cognition and its respective domains in areas such as working memory and attention can make this difficult to diagnose and treat. We aimed to establish a model of focal ischemia that targets the prefrontal cortex (PFC) and induce memory impairments. Stroke and sham mice were assessed at one and four-weeks post-stroke on various tests: open-field task to assess activity; grid-walk and cylinder task to assess motor impairments; elevated plus maze to assess anxiety; novel-object and object-location recognition tasks to assess memory impairment. Stroke mice in the open-field showed a small increase in activity with no effects on gross motor tasks or anxiety levels (P ≥ 0.05) at one and four-weeks post-stroke. Assessment of stroke mice on the novel object task showed no differences at either one or four-weeks compared to sham mice (P ≥ 0.05). However, assessment of stroke mice on the object-location recognition task revealed a significant (P ≥ 0.05) impairment in spatial memory by four-weeks compared to controls. Further, we show that stroke results in a small decrease in volume of the medial dorsal nucleus of the thalamus (P ≥ 0.05). This is the first evidence that demonstrates stroke to the PFC results in delayed onset impairment in spatial memory, similar to findings in human epidemiological data. We suggest that this model may be a useful tool in assessing potential rehabilitative/cognitive therapies after stroke.
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Mice with PFC stroke show impaired OPP, but not NOP, memory, along with reduced structural volume in the dorsal medial nucleus of the thalamus.
“Conversely, mice with PFC stroke showed impaired OPP, but not NOP, memory, along with reduced structural volume in the dorsal medial nucleus of the thalamus (Zhou et al., 2016).”
From The medial prefrontal cortex - hippocampus circuit that integrates information of object, place and time to construct episodic memory in rodents: Behavioral, anatomical and neurochemical properties (2020) · cites this paper as Zhou et al., 2016
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The role of the medial prefrontal cortex in cognition, ageing and dementia
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- Authors
- Zhou, L. Y. Y., Wright, T. E., & Clarkson, A. N.
- Affiliations
- Brain Research New Zealand (NZ)
- The University of Sydney (AU)
- Corresponding author
- Clarkson, Andrew N.
- Venue
- Behavioural Brain Research
- Publisher
- Elsevier BV
- Published
- 2016-01
- Volume
- 296
- Pages
- 373-378
- ISSN
- 0166-4328 (ISSN-L)
- OpenAlex
- W1125777540
- Cited by
- 44
- References
- 22
- Citations by year
- 2025: 2 · 2024: 4 · 2023: 5 · 2022: 4 · 2021: 8 · 2020: 6 · 2019: 5 · 2018: 4 · 2017: 5 · 2016: 1
- FWCI
- 1.78
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Behavioural Brain Research (publishedVersion)
- PubMed (publishedVersion)
- Funders
- University of Otago Masters Scholarship (TEW)
- Royal Society of New Zealand Marsden Fund
- Topics
- Life Sciences › Neuroscience › Neurology › Neurological Disease Mechanisms and Treatments
- Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
- Social Sciences › Psychology › Experimental and Cognitive Psychology › Cognitive Functions and Memory
- Keywords
- stroke, prefrontal cortex, spatial memory impairment, focal cerebral ischemia, novel object recognition, mediodorsal thalamus, cognitive impairment, mouse stroke model, stroke rehabilitation
- MeSH terms
- Animals, Behavior, Animal, Brain Ischemia, Disease Models, Animal, Male, Memory Disorders, Mice, Inbred C57BL, Time Factors, Prefrontal Cortex, Stroke, Mediodorsal Thalamic Nucleus, Mice, Spatial Memory
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