Brain CT Scan Study of Mentally Retarded Individuals with Comorbid Psychiatric Disorder

Epidemiological surveys indicate that up to two thirds of children and adults with mental retardation has comorbid mental disorders; this rate is several times higher than that in the community samples of those not mentally retarded (1). Few studies have been employed to focus on the possible causes of the above findings. To investigate into the CT Scan brain of mentally retarded with comorbid psychiatric disorder. Patients, presenting with mental retardation with comorbid psychiatric disorder, are investigated for abnormal computed tomographic brain scan and then CT brain scan findings are analyzed. 63.33% of mentally retarded with comorbid psychiatric disorder showed abnormal CT brain scan. Among the abnormal CT brain scan, 63.15% showed lesion in the parietal region and of them left sided parietal lesion (66.66%) was more than right sided lesion (33.33%).