Abstract
One hundred and seven patients with the vibration disease and 26 controls were examined, using rheoencephalograms of the frontal, occipital and basilar areas to ascertain the state of the cerebral blood flow. Pulse waves were obtained at rest and after nitroglycerin administration. Indices of upstroke time (UT), upstroke rate (UR), dicrotic index (DI) and minute volume (MV) were calculated by analyzing the data. Cerebral blood vessels of the patients were tonic and functionally contracted, and it was suggested that organic changes were induced in the blood vessels of the basilar area especially in stage IV patients who were the most severe.
