자기공명영상을 이용한 정신분열병 환자의 뇌량크기 측정
Measurement of Corpus Callosal Area in Schizophrenia Patients Using by Magnetic Resonance Imaging
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목 적 자기공명영상을 이용하여 정신분열병 환자에서 뇌량의 구조적 이상을 보고한 연구들이 많으나, 결과가 다양하고 일치하지는 않는다. 본 연구는 정신분열병에서 뇌량의 크기의 변화 여부를 확인하기 위하여 실시하였다. 방 법 2002년 1월부터 2003년 12월까지 대구가톨릭대학병원 정신과를 방문한 환자 중 DSM-IV(1994) 기준으로 정신분열병 진단을 받은 환자 중 뇌자기공명영상을 이용하여 뇌량을 측정한 24명(남자 11명, 여자 13명)을 대상으로 연구를 진행하였으며, 이 결과를 25명의 대조군(남자 7명, 여자 18명)과 비교하였다. 정중시상평면에서 뇌량을 7개 영역으로 구분하였다. 전체 뇌량 및 나누어진 부위의 면적과 정중시상평면의 대뇌면적도 측정하였다. 환자 군과 대조군의 전체 뇌의 크기 차이에 따른 뇌량의 상대적인 크기 차이를 보상하기 위해 각 환자의 대뇌 단면적에 대한 뇌량의 부위별 면적의 비를 계산하여 두 군을 비교하였다. 이상의 자료를 독립 t 검증을 사용하여 분석하였다. 결 과 본 연구에서는 뇌량 무릎(1.64±0.32 vs 1.43±0.26 ; p<0.05)과 뇌량 팽대(2.16±0.27 vs 1.96±0.30 ; p<0.05)의 크기를 대뇌면적에 비교한 값이 대조군에 비해 환자군에서 통계적으로 유의하게 작은 것으로 나타났다. 대뇌면적에 대한 뇌량 전체의 비(%) (7.50±0.72 vs 6.90±0.82 ; p<0.05)도 환자군에서 통계적으로 유의하게 더 적게 나타났다. 결 론 정신분열병 환자에서 부분적인 뇌량의 크기가 정상인과 차이가 있음을 확인하였다.
Abstract
Objectives Nowadays many studies with MRI have reported structural abnormalities of corpus callosum of schizophrenic patients. However, the results are various and inconstant. In this study, we attempted to identify structural change of corpus callosum. Method We measured the size of corpus callosum of the 24 schizophrenia patients (male 11, female 18) who were diagnosed by DSM-IV (1994), visited at department of psychiatry, catholic university hospital of Daegu from January 2002 to December 2003, by using midline sagittal slice of MRI. These results were compared with the size of corpus callosum of 25 controls (male 7, female 18). We divided corpus callosum into 7 areas. We calculated and compared the areas of each subregion, mid-sagittal cerebral area, and entire corpus callosum. The results were analyzed by independent t-test. Result When we compared subregion to corpus callosum adjusted with mid-sagittal cerebral area, schizophrenia patients had significantly smaller genu (1.64 .32 vs. 1.43.26; p<0.05) and splenium (2.16 .27 vs. 1.96 .30; p<0.05). Similarly, the ratio of total corpus callosum to midline sagittal cerebral area (%) (7.50 0.72 vs. 6.90 0.82; p<0.05) was significantly smaller in schizophrenia than control group. Conclusion In this study, we found significant differences in corpus callosum between schizophrenic patients and normal control group.
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