Reaction time in cerebrovascular disease.

One hundred and eight patients have been investigated clinically, by computer tomography and by measuring the reaction time (RT). Thirty six controls without histories of brain disease, normal psychiatric findings and the same mean age as the other groups, were compared with 37 stroke patients without and 35 stroke patients with dementia. The dementia was defined clinically and by a psychological test (WAIS) and by applying a deterioration index (Baxa and Pakesch, 1972).

Rheological aspects of cerebrovascular disease.

Disturbances of the flow properties of the blood may occur in more than 40% of patients with CVD. Abnormal rheologic conditions can be measured as increased blood viscosity and may be caused by corpuscular as well as by plasmatic factors.