QUANTIFIED EEG IN DIFFERENT G-SITUATIONS

The electrical activity of the brain (EEG) has been recorded during pa rabolic flights in trained astronauts and non trained volunteers as we ll. The Fast Fourier analysis of the EEG activity evidenced more asymm etry between the two brain hemispheres in the subjects who suffered fr om motion sickness than in the others. However, such a FFT classificat ion does not lead to a discrimination between deterministic and stocha stic events. Therefore, a first attempt was made to calculate the dime nsionality of ''chaotic attractors'' in the EEG patterns as a function of the different g-epochs of one parabola. Very preliminary results a re given here.