Surgery – Diagnostic testing – Detecting brain electric signal
Patent
1997-07-30
1999-12-21
Peffley, Michael
Surgery
Diagnostic testing
Detecting brain electric signal
600545, 600546, A61B 504
Patent
active
RE0364509
ABSTRACT:
An apparatus and a method for automatically determining the present somatic state of a human subject. The characteristic values of the subject (e.g., scalp potential, muscle potential, heart-rate, eye-movement and frequency of eye blinks, or any combination thereof) are detected and output signals corresponding to the detected characteristic values are produced, amplified and digitized. The Fourier transformation is performed on the output signals. A set of state variables for each selected frequency sub-band of a selected frequency band for each of the output signals is determined. Sets of reference weights and sets of reference biases for a neural network from sets of state reference variables corresponding to known somatic states are formed. Each of the sets of state variables, the sets of reference weights and the sets of reference biases are applied to the neural network to determine present somatic state of the subject. The present somatic state of the subject is displayed.
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Brain Functions Laboratory, Inc.
Cardwell Douglas A.
Huang Stephon
Peffley Michael
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