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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Correlation between thyroid function and cholinesterase activity of dog brain during radiation sickness
Electroencephalogram classification of bioelectric activity in human brain
Psychochemical research theory and methodology, relating biochemical phenomena to human brain function
Visual systems of hamster brain, discussing relative visual localization and discrimination blindness produced by ablation of cortical or tectal areas
EEG lead sensitivity to location and orientation of sources in brain by applying reciprocity theorem
Centrifugation for removal of bullet fragment floating freely in ventricular system of human brain to fixed safe position in left lateral ventricle wall
Optical eye oximeter for measuring oxygen of choroidal blood for monitoring brain oxygen supply
Tetrodotoxin /TTX/ effects on mammalian brain studied by introducing TTX into cat lateral geniculate body /LGB/, causing flash evoked potentials and visual cortex decrease
Neural information processing taking into account differences between living brain and artificial processor
Centrifuging as therapeutic device tested on male assault victim with bullet fragment floating freely in brain ventricular system
Drosophila brain Circadian oscillation as gating device restricting emergence behavior of adult
Chick embryogenesis during hypoxia at high altitude, noting metabolic repression effects, hypothermia and brain atrophy
Neuroregulatory agents instrumentation based on compounds brain level, enzymatic formation and radio labeling
Electrical potentials in response to auditory stimuli recorded in cat brains by averaging computer
Mars photography from flybys and orbiters, communicating planetary scene information to eye- brain receiver of earth based interpreters
Development of apparatus and method for quantitatively measuring brain activity as automatic indication of sleep state and level of consciousness
Sexual behavior of male cats after parachlorophenylalanine injections, noting unchanged or diminished performance and serotonin lowering in brain
The problem of tracking Alpha voltage variations in an electroencephalogram is discussed. This problem is important in encephalographic studies of sleep and effects of different stimuli on the brain. Very often the Alpha voltage is tracked by passing the EEG signal through a bandpass filter centered at the Alpha frequency, which hopefully will filter out unwanted noise from the Alpha activity. Some alternative digital techniques are suggested and their performance is compared with the standard technique. These digital techniques can be used in an environment where an electroencephalograph is interfaced with a small digital computer via an A/D convertor. They have the advantage that statistical statements about their variability can sometimes be made so that the effect sought can be assessed correctly in the presence of random fluctuations.