Measurement of EEG reactivity

Details Measurement of EEG reactivity Measurement of EEG reactivity

2005-11-14

2011-11-22

Hoekstra, Jeffrey G (Department: 3736)

Surgery

Diagnostic testing

Detecting brain electric signal

C600S545000, C600S559000

Reexamination Certificate

active

08064993

ABSTRACT:
The invention relates to a method and apparatus for assessing the reactivity observable in a certain physiological signal, especially the EEG signal, of a comatose subject. In order to obtain an objective and a reliable measure of the reactivity automatically and without the presence of a trained EEG specialist, a time reference corresponding to a stimulus is detected and the physiological signal data obtained from the subject is aligned with the time reference. Two sets of values are determined for a measure indicative of the amount of irregularity in the physiological signal data, both sets including at least one value of the said measure and having defined positions with respect to the time reference in time domain. Based on the two sets, the apparatus determines whether reactivity is present in the physiological signal data.

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