Systems and methods for counter-phase dichoptic stimulation
Systems and methods for counter-phased binocular stimulation may include a device that determines a target frequency of a stimulation response. The device may output a first visual stimulation at a first frequency and a first phase to a first eye. The device may output a second visual stimulation at a second frequency and a second phase to a second eye. The first visual stimulation and the second visual stimulation may together produce the stimulation response at the target frequency.
1. A method comprising:
identifying, by one or more processors, a target frequency of a stimulation response;
determining, by the one or more processors, according to the target frequency, a first frequency for stimulation to a first eye and a second frequency for stimulation to a second eye, the target frequency being different than and harmonically related to the first frequency and the second frequency, the first frequency being counterphased with respect to the second frequency; and
transmit, by the one or more processors, one or more signals to one or more output devices, to provide stimulation to the first eye and the second eye, the stimulation simultaneously output at the first frequency to the first eye and the second frequency to the second eye, to produce the stimulation response at the target frequency.
2. The method of claim 1 , wherein the first frequency and the second frequency are substantially half of the target frequency.
3. The method of claim 1 , wherein the stimulation output to the first eye and to the second eye comprises visual stimulation output to the first eye and the second eye.
4. The method of claim 1 , wherein the target frequency is equal to 38 Hz, the first frequency is equal to 19 Hz, and the second frequency is equal to 19 Hz.
5. The method of claim 1 , wherein the one or more output devices comprises one or more first light sources and one or more second light sources, the method further comprising:
transmitting, by the one or more processors, a first signal of the one or more signals to the one or more first light sources to output light at the first frequency, and
transmitting, by the one or more processors, a first signal of the one or more signals to the one or more second light sources to output light at the second frequency.
6. The method of claim 5 , wherein the one or more first light sources are located at a first position of a head-wearable device and the one or more second light sources located at a second position of the head-wearable device, the first position corresponding to stimulating the first eye when the head-wearable device is worn, and the second position corresponding to stimulating the second eye when the head-wearable device is worn.
7. The method of claim 1 , wherein the one or more output devices comprise an audio output device and one or more light sources, the method further comprising:
transmitting, by the one or more processors to the audio output device, an audio signal for outputting while the stimulation is provided via the one or more light sources to the first eye and the second eye.
8. The method of claim 1 , wherein the target frequency is in a frequency band, the frequency band being greater than 40 Hz, between 30 Hz and 40 Hz, between 13 Hz and 30 Hz, between 8 Hz and 13 Hz, between 4 Hz and 8 Hz, or between 0.5 Hz and 4 Hz.
9. The method of claim 1 , wherein determining the first frequency and the second frequency comprises determining, by the one or more processors, a first oscillation state for the first eye and a second oscillation state for the second eye, the first oscillation state comprising the first frequency and the second oscillation state comprising the second frequency.
10. A system comprising:
one or more output devices; and
one or more processors configured to:
identify a target frequency of a stimulation response;
determine, according to the target frequency, a first frequency for stimulation to a first eye and a second frequency for stimulation to a second eye, the target frequency being different than and harmonically related to the first frequency and the second frequency, the first frequency being counterphased with respect to the second frequency; and
transmit one or more signals to the one or more output devices, to provide stimulation to the first eye and the second eye, the stimulation simultaneously output at the first frequency to the first eye and the second frequency to the second eye, to produce the stimulation response at the target frequency.
11. The system of claim 10 , wherein the first frequency and the second frequency are substantially half of the target frequency.
12. The system of claim 10 , wherein the target frequency is equal to 38 Hz, the first frequency is equal to 19 Hz, and the second frequency is equal to 19 Hz.
13. The system of claim 10 , wherein the one or more output devices comprises one or more first light sources and one or more second light sources, wherein the one or more processors are configured to:
transmit a first signal of the one or more signals to the one or more first light sources to output light at the first frequency, and
transmit a first signal of the one or more signals to the one or more second light sources to output light at the second frequency.
14. The system of claim 13 , wherein the one or more first light sources are located at a first position of a head-wearable device and the one or more second light sources located at a second position of the head-wearable device, the first position corresponding to stimulating the first eye when the head-wearable device is worn, and the second position corresponding to stimulating the second eye when the head-wearable device is worn.
15. The system of claim 10 , wherein the one or more output devices comprise an audio output device and one or more light sources, wherein the one or more processors are configured to:
transmit, to the audio output device, an audio signal for outputting while the stimulation is provided via the one or more light sources to the first eye and the second eye.
16. The system of claim 10 , wherein the target frequency is in a frequency band, the frequency band being greater than 40 Hz, between 30 Hz and 40 Hz, between 13 Hz and 30 Hz, between 8 Hz and 13 Hz, between 4 Hz and 8 Hz, or between 0.5 Hz and 4 Hz.
17. The system of claim 10 , wherein to determine the first frequency and the second frequency, the one or more processors are configured to determine a first oscillation state for the first eye and a second oscillation state for the second eye, the first oscillation state comprising the first frequency and the second oscillation state comprising the second frequency.
18. A device comprising:
one or more output devices; and
one or more processors configured to:
identify a target frequency of a stimulation response;
determine, according to the target frequency, a first frequency for stimulation to a first eye and a second frequency for stimulation to a second eye, the target frequency being different than and harmonically related to the first frequency and the second frequency, the first frequency being counterphased with respect to the second frequency; and
transmit one or more signals to the one or more output devices, to provide stimulation to the first eye and the second eye, the stimulation simultaneously output at the first frequency to the first eye and the second frequency to the second eye, to produce the stimulation response at the target frequency.