Patent ID: 6052619
Filing Date: 2000-04-18
Classification: A61B

Abstract:
A medical system to transmit data regarding brain injury or dysfunction comprising:(a) a headband and at least two EEG (electroencephalograph) electrode means carried therein to detect a human subject's brain waves, the electrode means being located as homologous pairs with one electrode means of each pair on the left and the other electrode of the pair on the right side of the brain;(b) amplification means to amplify and digitize the detected brain waves and to produce subject brain wave data therefrom;(c) switching means to switch the amplification means, in sequence, to different homologous (L/R) pairs of the electrode means in order to construct a scan;(d) means to confirm stationarity of a subject's brain state at a selected fiducial electrode across the set of N scans required to assess the brain state of the subject;(e) means to extract measures from the group of absolute power, relative power, coherence (synchrony) and symmetry for each sample of EEG from a pair of electrodes and to average each of selected measures across the full set of scans;(f) computer means to compare subject's brain wave data of (e) with brain wave data based upon a normal group of subjects and to produce an almost real-time report based thereon regarding an excess or deficit of energy selected from the group of beta, alpha, theta or delta bands and to assess across sequential scans an increasing shift in local slow wave reflecting injury or dysfunction or, in each pair, asymmetric slow waves indicating cerebral ischemia.