title: Letter: Mental activity and cerebral blood-flow.
mesh_terms: D002196:Capillaries / Q000503:physiopathology; D002560:Cerebrovascular Circulation; D005625:Frontal Lobe / Q000098:blood supply / Q000503:physiopathology; D006801:Humans; D008606:Mental Processes; D012039:Regional Blood Flow; D012559:Schizophrenia / Q000503:physiopathology