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흰쥐의 흥분성 및 공격적 행동에 대한 대상회전 제거의 영향
심동원,김종규 순천향대학교 1983 논문집 Vol.6 No.2
변연계에 속하는 구조들이 흥분성 및 공격적 행동에 관여한다는 보고를 뒷받침하기 위하여 변연계에 속하는 대상회전이 흥분성 및 공격적 행동에 미치는 영향을 알기 위하여 대상회전을 떼어버린 대상회전군과 피부만을 절개하였던 수술대조군 및 정상대조군을 마련하여 실험을 실시하였다. 제시한 연필 혹은 장갑을 낀 손가락을 물어 뜯거나 냄새맡는 행위, 장갑을 낀 손으로 실험 동물을 붙잡았을 때(holding) 혹은 꽉 잡았을 때(capture) 느끼는 저항, 소리지르는 행위 및 생쥐를 죽이는 행위 등의 출현회수를 지표로 하여 평가하였다. 실험 결과 얻은 성적은 다음과 같다. 대상회전군, 수술대조군 및 정상대조군 사이에 흥분성 및 공격성에 해당되는 위의 5 가지 범주를 나타내는 값이 모두 유의하게 다르지 않았다. 위의 실험 결과로 미루어 변연계에 속하는 구조들중 대상회전만은 흥분성 및 공격성에 관여하지 않는 것으로 사료된다. The study was planned to evaluate the effects of removal of the cingulate cortex upon the occurrence of aggressive behaviors and irritabilities, and to compare the effects of cingulectomy with those of operated control and normal control animals. Sixty male albino rats (Sprague-Dawley strain) were divided into 3 groups: The cingulate group in which the subcallosal portion of the cingulate cortex was ablated through a slit-shaped opening (lmm in width, 5mm in length) on each side of the sagittal suture in the frontal bone (N=21), the operated control group which received only scalp incision(N=19), and normal control group (N=20). Twenty observation cages (each of which housed a subject and was provided with food and water ad libitum) were arranged in 1 row on a rack. All testing was performed during the dark phase of a reversed light/dark cycle. Irritability was rated using a 5-category scale: (1) biting reaction to a pencil presented 1-2cm. in front of the rat's snout, (2) biting reaction to a gloved hand presented into the open cage 1-2cm. in front of the rat's snout, (3) resistance to holding by the gloved band, (4) resistance to capture, and (5) vocalization during testing. To determine aggressiveness (mouse killing), an albino mouse weighing approximately 20 gm. was placed in each rat's cage for 20 min., and instances of killing were recored. Results obtained were as follows: There were no significant differences found in the cingulate group, compared with those-of operated control and normal control group. Based on the above mentioned results, it was inferred that the cingulate cortex tended to exert no influence upon the irritability and the aggressive behavior of male rats.