Rheoencephalographic and electroencephalographic analysis of cognitive workload

Changes in brain blood flow and neural activity during mental work are investigated. Multichannel rheoencephalography (REG) and topographical electroencephalography (EEG) were used to measure subject responses to three levels of mathematical processing (MP), as administered by a modified version of the WPAFB criterion task set computer program. REG records were analyzed to provide indices of right and left hemisphere hemodynamic changes during MP. The EEG data were mathematically transformed to provide energy density distribution of the scalp electropotential which reflect the metabolic load required to perform each test sequence. The simultaneous use of these REG and EEG procedures may also be used in the study of a variety of disease states, such as brain injury and neurorehabilitation