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Method for forming brain scalp electric potential information chart

An EEG signal, scalp technology, applied in medical science, sensors, diagnostic recording/measurement, etc., can solve the problems of difficult to fully reflect the dynamic change process of EEG and the small amount of data.

Inactive Publication Date: 2002-01-30
TIANJIN UNIV
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Problems solved by technology

However, since the theoretical basis of its signal analysis is the sub-band power spectrum of the Fourier transform from the time domain to the frequency domain, the amount of data contained is relatively small, and there is a certain degree of subjectivity in data selection. It is difficult to fully reflect the dynamic change process of EEG

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  • Method for forming brain scalp electric potential information chart
  • Method for forming brain scalp electric potential information chart
  • Method for forming brain scalp electric potential information chart

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Embodiment Construction

[0046] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0047] figure 1 Show the workflow of the present invention, use the EEG acquisition and analysis system, place F on the subject's scalp according to the international standard lead 10-20 system p1 (left forehead), F p2 (right forehead), C 3 (top left), C 4 (top right), T 3 (left temporal), T 4 (right temporal), O 1 (left pillow), O 2(Right occipital) 8 lead electrodes, the reference electrode is placed on the left and right earlobes, and the EEG signal waveform of each lead is collected at the same time; the subject is required not to take medicine within three days before the experiment, and there is no disease during the experiment, sober and eyes closed, sitting quietly in the quiet laboratory Inside. The acquisition time of the original EEG signal is 5 minutes, and the A / D sampling frequency is 512Hz, and the EEG data when the patien...

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Abstract

The method for producing cerebral scalp potential graph relates to a formation method of potential information graph, and includes the following steps: according to the electroencephalic original data collected from different lead electrodes on the head portion and non-linear linetic theory utilizing phase space reconstitution technique to form scalp potential information transmission matrix between leads, then plotting the scalp topological distribution graph-electroencephalic information map (BIM) according to the information transmission quantity of every lead and time sequence complexity data and using a full-new angle to continuously reflect time space characteristics of electroencephalic activation to observe the change process of human brain function state. Said invention can be used for making scalp electroencephalic dianosis in the reseach of epileptic focus location and induced response, also can be used for EEG signal analysis of brain being in different physiological conditions or senile dementia patient.

Description

technical field [0001] The invention relates to a method for generating graphs, in particular to a method for generating potential information graphs. Background technique [0002] Currently clinically used Brain Electric Activity Mapping (BEAM) is a diagnostic technique based on scalp EEG computer analysis. Its principle is to collect EEG signals from different lead electrodes on the head, perform fast Fourier transform after filtering out various interferences and A / D conversion to obtain signal power spectra in different frequency bands, and then use two-dimensional interpolation method to display as equal Value Line Topographic Map. BEAM is not only used for clinical diagnosis of organic brain lesions, but also for observing changes in brain function, and has become a routine method for diagnosing brain diseases. However, since the theoretical basis of its signal analysis is the sub-band power spectrum of the Fourier transform from the time doma...

Claims

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Application Information

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IPC IPC(8): A61B5/0476
Inventor 万柏坤程晓曼綦宏志
Owner TIANJIN UNIV
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