using radioimmunoassay the authors studied concentrations of beta-endorphine and metenkephalin in the cerebrospinal fluid ( csf ) of 65 patients with various diseases of the central nervous system ( cns ) -- hereditary extrapyramidal disorders , disseminated sclerosis ( ds ) , lateral amyotrophic sclerosis ( las ) , spinal tumours , senile dementia , some cns impairments of inflammatory nature .
C0007682
diseases of the central nervous system
C0026769
disseminated sclerosis