Academic Journal
Differential recovery of multimodal MRI and behavior after transient focal cerebral ischemia in rats
| العنوان: | Differential recovery of multimodal MRI and behavior after transient focal cerebral ischemia in rats |
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| المؤلفون: | Sicard, Kenneth M., Henninger, Nils, Fisher, Marc, Duong, Timothy Q., Ferris, Craig F. |
| المساهمون: | Department of Psychiatry, Graduate School of Biomedical Sciences, Department of Neurology |
| المصدر: | Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism ; 26 ; 11 ; 1451-62 |
| سنة النشر: | 2022 |
| المجموعة: | University of Massachusetts, Medical School: eScholarship@UMMS |
| مصطلحات موضوعية: | Animals, Behavior, Animal, Brain Mapping, Carbon Dioxide, Hypercapnia, Ischemic Attack, Transient, Magnetic Resonance Imaging, Male, Motor Activity, Nerve Net, Oxygen, Psychomotor Performance, Rats, Sprague-Dawley, Sensation, Neurology, Neuroscience and Neurobiology |
| الوصف: | The association between recovery of brain function and behavior after transient cerebral ischemia in animals and humans is incompletely characterized. Quantitative diffusion- (DWI), perfusion- (PWI), T(2)-weighted (T(2)WI), and functional magnetic resonance imaging (fMRI) were performed before, during, and up to 1 day after 20-mins transient middle cerebral artery occlusion (tMCAO; n=6) or sham operation (n=6) in male Sprague-Dawley rats. Viability thresholds were employed to calculate diffusion, perfusion, and T(2) lesion volumes. Region of interest analysis was used to evaluate structural and functional MR signal changes within the sensorimotor network, which were then related to corresponding behavioral measures. Post-mortem 2,3,5-triphenyltetrazolium chloride (TTC) staining was performed 24 h after ischemia. Transient middle cerebral artery occlusion produced lesions on DWI and PWI, which fully recovered by 30 mins after reperfusion. Ipsilesional fMRI responses to hypercapnia and forepaw stimulation were significantly impaired after ischemia and did not fully normalize until 3 and 24 h after tMCAO, respectively. No abnormalities were observed on imaging or TTC at 24 h despite significant behavioral dysfunctions including contralesional forelimb impairment and ipsilesional neglect. No MRI, behavioral, or TTC anomalies were observed in sham-operated rats. There were no significant correlations between MRI parameters, behavior, and TTC in either group. Together, these results suggest that normal findings on diffusion, perfusion, and T(2) imaging shortly after transient ischemia may not indicate normal tissue status as indicated by fMRI and behavior, which may help explain the persistence of neurologic deficits in patients with normal conventional MRI after cerebral ischemia. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | Link to article in PubMed; http://dx.doi.org/10.1038/sj.jcbfm.9600299; J Cereb Blood Flow Metab. 2006 Nov;26(11):1451-62. Epub 2006 Mar 15. Link to article on publisher's site; 0271-678X (Print); http://hdl.handle.net/20.500.14038/37627; https://escholarship.umassmed.edu/neuro_pp/170; 499352; neuro_pp/170 |
| DOI: | 10.1038/sj.jcbfm.9600299 |
| الاتاحة: | https://doi.org/10.1038/sj.jcbfm.9600299 https://hdl.handle.net/20.500.14038/37627 https://escholarship.umassmed.edu/neuro_pp/170 |
| رقم الانضمام: | edsbas.E46D0F85 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1038/sj.jcbfm.9600299 |
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