Method and system for brain activity signal-based treatment and/or control of user devices
AssigneeUniversity Health Network
InventorsCésar Marquez Chin, Kathryn Atwell, Milos R. Popovic
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Abstract
A method for characterizing a brain electrical signal comprising forming a temporo-spectral decomposition of the signal to form a plurality of time resolved frequency signal values, associating each instance of the signal value with a predetermined function approximating a neurological signal to form a table of coefficients collectively representative of the brain electrical signal.
Claims17
A system for translating analog event-related desynchronization (ERD) signals from a user into an identifiable intended activity (IA), the system comprising:
- a. at least one input to receive one or more ERD signals;
- b. at least one output to send device action instructions to a user device to carry out a device action corresponding to the IA;
- and
- c. a controller to communicate with the at least one input and the at least one output of the user device, the controller including at least one special purpose processor configured to run at least one computer program:
- i. to record an ERD signal received from the at least one input, the ERD signal corresponding to an uncharacterized IA of the user for each time value of one or more successive time values,
- ii. for each time value:
- 1. to access one or more ERD templates of coefficients for one or more characterized IA's, the ERD templates of coefficients being formed by correlating a plurality of time resolved frequency ERD signal values with a function approximating a synthetic ERD signal;
- 2. to update an ERD table for the uncharacterized IA and to compare the updated ERD table with the ERD templates to determine whether the uncharacterized IA is an instance of one of the characterized IA's;
- and
- iii. to initiate a corresponding device action instruction on at the at least one output after a minimum number of time values necessary to determine whether the uncharacterized IA is an instance of one of the characterized IA's.
A method for translating analog event-related desynchronization (ERD) signals from a user into an identifiable intended activity (IA) to form one or more ERD templates for use in associating an updated ERD table of an uncharacterized IA therewith to identify and initiate a corresponding intended device action by a user device, the method comprising:
- a. recording one or more ERD signals from one or more electrodes operatively placed on the user, wherein each of the ERD signals corresponds to a characterized intended activity (IA) of the user for each time value of one or more successive time values;
- b. for each time value, forming a temporo-spectral decomposition of the ERD signal, to form a plurality of time resolved frequency ERD signal values;
- c. associating each ERD signal value with a function approximating a synthetic ERD signal to form at least one ERD table of coefficients collectively representative of the characterized IA;
- d. repeating step c for a number of instances of the characterized IA to form a number of at least one ERD tables;
- and
- e. forming the ERD template for the characterized IA from the number of ERD tables for the characterized IA.
Dependencies are inferred from the claim text.