The author studied on the callosal function of 20 chronic schizophrenic patients who met DSM-III criteria and compared the results with those of age, sex matched 20 controls. In this study Cross Retrieval of Small Test Objects, Cross Replication of Hand Postures and Cross Localization of Fingertips, which are known as tests that can evaluate interhemispheric transfer of information, were used. The results were as follows • 1) Correct answers in normal control group were 633 out of 640 total questions with 98.9 깠 of correctness, which approximates almost 100%. 2) Number of mean errors in patient group(2.8000± 2.262) was higher than that of control group (0.400± 0.503) and the difference between the 2 groups was significant (p<0.001). 3) Number of delayed responses in the patient gorup(3.100± 2.789) was also higher than that of control group (0.5500± 0.887) and the difference between the 2 groups was significant too (p<0.001). 4) Subtype (paranoid vs undifferentiated), family history of mental and/or neurological disease and sex in the patient group made no difference. With the above results the author suggest that chronic schizophrenics suffer from callosal dysfunction and schizophrenic patients (in the case of paranoid and undifferentiated type) are homogeneous in terms of callosal function as far as family history and sex are concerned.
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