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Journal of the Korean Academy of Rehabilitation Medicine 2002;26(5):495-501.
Intrahemispheric Diaschisis in Subcortical Lesions.
Kim, Deog Young , Park, Chang il , Choi, Young Seok , Jang, Yong Won , Moon, Ja Young , Kim, Dug Young
Department of Rehabilitation Medicine and Research Institute of Rehabilitation Medicine, Yonsei University College of Medicine, Korea. dragonorigin@hanmail.net
대뇌피질하 뇌병변에 의한 반구내 기능저하
김덕용, 박창일, 최용석, 장용원, 문자영, 김덕영
연세대학교 의과대학 재활의학교실 및 재활의학연구소
Abstract

Objective
The aim of this study was to investigate the incidence of intrahemispheric diaschisis in subcortical lesions and relationships between involved structures and intrahemispheric diaschisis using positron emission tomography (PET).


Method
Thirty stroke patients with unilateral subcortical lesions without cortical structural abnormality were recruited. The findings of [18F]Fluoro-2-Deoxy-D-Glucose PET were interpretated by experienced radiologist.


Results
In the lesions around basal ganglia, hypometabolism of ipsilateral whole hemisphere was observed in 8 of 20 patients and ipsilateral parietal, frontal, temporal, occipital lobe was observed in order of incidence. Intrahemispheric diaschisis had a tendency to expand when the centrum semiovale was involved. Crossed cerebellar diaschisis was observed in 17 of 20 patients. In the lesions around thalamus, hypometabolism of ipsilateral whole hemisphere was observed in 6 of 8 patients, and ipsilateral frontal, temporal, parietal lobe was observed in order of incidence. Intrahemispheric diaschisis had a tendency to expand when the internal capsule was involved. Crossed cerebellar diaschisis was observed in 5 of 8 patients.


Conclusion
This study shows that intrahemispheric diaschisis was observed in all patients with subcortical lesions without cortical structural abnormality and had a tendency to expand to larger area of the cerebral cortex when the connecting fibers between cortical and subcortical structures were involved. (J Korean Acad Rehab Med 2002; 26: 495-501)

Key Words: Stroke, Diaschisis, PET


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