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Updated: Jul 10, 2026
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Focal Cerebral Ischemia Model by Endovascular Suture Occlusion of the Middle Cerebral Artery in the Rat
Published on: February 5, 2011
No Detectable Spatial Cognitive Impairment Despite Acute Sensorimotor Deficits Following Transient Middle Cerebral
Michael Veldeman1, Mark Coburn2,3, Anke Hoellig1
1Department of Neurosurgery, University Hospital RWTH Aachen, Aachen, Germany.
Brain and Behavior
|July 9, 2026
Summary
Transient middle cerebral artery occlusion (tMCAO) in rats showed temporary sensorimotor deficits but no lasting cognitive impairment. This suggests the model may not be ideal for studying stroke-related cognitive dysfunction.
Area of Science:
- Neuroscience
- Stroke Research
- Animal Models
Background:
- Ischemic stroke causes significant mortality and disability, often leading to persistent cognitive deficits.
- Transient middle cerebral artery occlusion (tMCAO) models are used to study stroke, but cognitive outcome reporting is inconsistent.
- Sensorimotor deficits can confound cognitive assessments in stroke models.
Purpose of the Study:
- To determine if a 2-hour tMCAO model in rats produces measurable spatial learning, memory, or cognitive flexibility deficits.
- To analyze longitudinal behavioral data from a tMCAO cohort post hoc.
- To assess the suitability of the tMCAO model for studying post-stroke cognitive impairment.
Main Methods:
- Male Wistar rats underwent 2-hour tMCAO or Sham surgery.
- Animals were excluded based on predefined quality criteria (occlusion, reperfusion, hemorrhage).
- Behavioral testing included neurological scoring, Morris water maze, reversal learning, and open field tests over 30 days.
Main Results:
- tMCAO rats showed acute sensorimotor deficits that resolved by Day 30.
- Spatial acquisition, memory (Morris water maze), and reversal learning remained intact.
- Open field tests revealed no significant locomotor, exploratory, or anxiety-like deficits.
Conclusions:
- The 2-hour tMCAO model, under stringent quality control, resulted in transient sensorimotor impairment but no detectable spatial cognitive deficits within 30 days.
- This model may be less suitable for studying cognitive dysfunction post-stroke.
- Consideration of sensorimotor endpoints or alternative models is suggested for cognitive dysfunction research. This study also exemplifies the 3Rs principle of reduction.
