Patent ID: 8460196
Filing Date: 2013-06-11
Classification: A61B

Abstract:
1. Method for monitoring brain activity comprising: detecting with a sensor or sensors left and right cardiac pulse signals at bilateral locations on a body for a selected number of cardiac cycles; computing on a computing apparatus the standard deviation of the left and right pulse signals for the selected number of cardiac cycles; normalizing on the computing apparatus the standard deviation of the left and right pulse signals by dividing the left and right standard deviations by the mean of the left and right pulse signals, respectively, computed over the selected number of cardiac cycles to produce a left and a right Coefficient of Variation (CV) of the pulse signals; and generating a Bilateral Pulse Index (BPI) from the left and right Coefficients of Variation according to the equation BPI=((Left CV+Right CV)/2)+(Absolute (Left CV−Right CV)), wherein BPI relates to brain activity.