SYSTEMS AND METHODS FOR FREQUENCY AND WIDE-BAND TAGGING OF MAGNETOENCEPHALOGRAPY (MEG) SIGNALS
A biological signal detection system includes one or more magnetic field sensors for placement on a user and for detecting signals generated by biological magnetic field sources of the user; at least one memory; at least one processor coupled to the at least one memory and the one or more magnetic field sensors and configured to receive the detected signals of the one or more magnetic field sensors. The at least one processor is configured to perform actions including receiving the detected signals from the magnetic field sensors; determining whether the detected signals are modulated by a predetermined stimulus tag; and, in response to the determination, identifying which of the detected signals are modulated by the predetermined stimulus tag.
1 . A biological signal detection system, comprising:
one or more magnetic field sensors configured and arranged for placement on a user and for detecting signals generated by biological magnetic field sources of the user;
at least one memory;
at least one processor coupled to the at least one memory and the one or more magnetic field sensors and configured to receive the detected signals of the one or more magnetic field sensors, wherein the at least one processor is configured to perform actions comprising:
receiving the detected signals from the magnetic field sensors;
determining whether the detected signals are modulated by a predetermined stimulus tag; and
in response to the determination, identifying which of the detected signals are modulated by the predetermined stimulus tag.
2 . The biological signal detection system of claim 1 , wherein the actions further comprise
producing a stimulus for the user; and
modulating a portion of the stimulus using the predetermined stimulus tag.
3 . The biological signal detection system of claim 2 , wherein the actions further comprise
altering the stimulus in response to identifying which of the detected signals are modulated by the predetermined stimulus tag.
4 . The biological signal detection system of claim 3 , wherein altering the stimulus comprises altering a visual content of the stimulus in response to the determination.
5 . The biological signal detection system of claim 2 , wherein the stimulus is a visual stimulus.
6 . The biological signal detection system of claim 2 , wherein the stimulus is an audible stimulus.
7 . The biological signal detection system of claim 2 , wherein the stimulus is a tactile stimulus.
8 . The biological signal detection system of claim 1 , wherein the stimulus tag is a frequency tag at a predetermined frequency.
9 . The biological signal detection system of claim 1 , wherein the stimulus tag is a broadband tag over a predetermined range of frequencies.
10 . The biological signal detection system of claim 1 , wherein the stimulus tag is a noise tag.
11 . The biological signal detection system of claim 1 , wherein determining whether the detected signals are modulated by the predetermined stimulus tag comprises generating a correlation between the detected signals and the predetermined stimulus tag and determining whether the detected signals are modulated by the predetermined stimulus tag.
12 . The biological signal detection system of claim 1 , wherein determining whether the detected signals are modulated by the predetermined stimulus tag comprises determining whether the detected signals are modulated by a predetermined first stimulus tag;
wherein identifying which of the detected signals are modulated by the predetermined stimulus tag comprises identifying which of the detected signals are modulated by the predetermined first stimulus tag;
wherein the actions further comprise
determining whether the detected signals are modulated by a predetermined second stimulus tag, wherein the second stimulus tag is different from the first stimulus tag; and
in response to the determination, identifying which of the detected signals are modulated by the predetermined second stimulus tag.
13 . The biological signal detection system of claim 1 , wherein the actions further comprise communicating with a stimulus generator indicating which of the detected signals are modulated by the predetermined stimulus tag.
14 . The biological signal detection system of claim 1 , wherein the detected signals originate in a brain of a user.
15 . The biological signal detection system of claim 2 , wherein the biological signal detection system is a closed-loop MEG-brain machine interface.
16 . The biological signal detection system of claim 12 , wherein the biological signal detection system is a closed-loop MEG-brain machine interface.
17 . A non-transitory computer-readable medium having stored thereon instructions for execution by a processor to perform actions including:
receiving detected signals from one or more magnetic field sensors;
determining whether the detected signals are modulated by a predetermined stimulus tag; and
in response to the determination, identifying which of the detected signals are modulated by the predetermined stimulus tag.
18 . The non-transitory computer-readable medium of claim 17 , wherein the actions further include
producing a stimulus for a user; and
modulating a portion of the stimulus using the predetermined stimulus tag.
19 . The non-transitory computer-readable medium of claim 18 , wherein the actions further include altering the stimulus in response to identifying which of the detected signals are modulated by the predetermined stimulus tag.
20 . The non-transitory computer-readable medium of claim 17 , wherein the stimulus tag is a frequency tag at a predetermined frequency.
21 . The non-transitory computer-readable medium of claim 17 , wherein the stimulus tag is a broadband tag over a predetermined range of frequencies.
22 . The non-transitory computer-readable medium of claim 17 , wherein the stimulus tag is a noise tag.