Apparatus and methods for predicting therapy outcome
Apparatus and methods are described for use with electrophysiological signal detecting electrodes, and a transcranial magnetic stimulation device. A computer processor drives the transcranial stimulation device to apply one or more pulses of transcranial magnetic stimulation to a subject. Within a given time period of applying one of the one or more pulses of transcranial magnetic stimulation to the subject, the computer processor detects an electrophysiological signal of the subject, using the electrophysiological signal detecting electrodes. At least partially in response thereto, the computer processor predicts an outcome of treating the subject for a neuropsychiatric condition, using a given therapy, and generates an output on an output device in response to the predicted outcome. Other applications are also described.
1. Apparatus for use with electrophysiological signal detecting electrodes, and a transcranial magnetic stimulation device, the apparatus comprising:
an output device; and
a computer processor configured to:
drive the transcranial stimulation device to apply one or more pulses of transcranial magnetic stimulation to a subject by driving the transcranial stimulation device to apply a plurality of trains of transcranial magnetic stimulation to the subject;
detect an electrophysiological signal of the subject using the electrophysiological signal detecting electrodes within a given time period of applying one of the one or more pulses of transcranial magnetic stimulation to the subject, wherein the given time period occurs between successive pulses of a given train of transcranial magnetic stimulation;
at least partially in response to the electrophysiological signal detected within the given time period, predict an outcome of treating the subject for a neuropsychiatric condition, using a given therapy; and
generate an output on the output device in response to the predicted outcome.
2. The apparatus according to claim 1 , wherein the computer processor is configured to predict the outcome of treating the subject for the neuropsychiatric condition, using the given therapy, by predicting an outcome of treating the subject for depression using transcranial magnetic stimulation.
3. The apparatus according to claim 1 , wherein the computer processor is configured to predict the outcome of treating the subject for the neuropsychiatric condition, using the given therapy, by predicting an outcome of treating the subject for ADHD using transcranial magnetic stimulation.
4. The apparatus according to claim 1 , wherein the computer processor is configured to detect the electrophysiological signal of the subject by detecting an electroencephalography signal of the subject.
5. The apparatus according to claim 1 , wherein the computer processor is configured to predict the outcome of treating the subject for the neuropsychiatric condition using the given therapy by predicting a response time of the subject to being treated with the given therapy.
6. The apparatus according to claim 1 , wherein the computer processor is configured to predict the outcome of treating the subject for the neuropsychiatric condition using the given therapy by predicting a rate of improvement in the subject's neuropsychiatric condition, in response to being treated with the given therapy.
7. The apparatus according to claim 1 , wherein:
the computer processor is further configured to detect an electroencephalography (EEG) signal of the subject while the subject performs a task, and
the computer processor is configured to predict the outcome of treating the subject for the neuropsychiatric condition using the given therapy, based upon the electrophysiological signal of the subject and a component of the EEG signal of the subject that was detected while the subject performed the task.
8. The apparatus according to claim 1 , wherein the computer processor is further configured to construct a brain network activity pattern based on the electrophysiological signal, and the computer processor is configured to predict the outcome of treating the subject for the neuropsychiatric condition using the given therapy based on the brain network activity pattern.
9. The apparatus according to claim 8 , wherein the computer processor is further configured to calculate a brain network activity pattern similarity score, by comparing the brain network activity pattern to a group brain network activity pattern that is based upon electrophysiological signals acquired from a group of subjects, and the computer processor is configured to predict the outcome of treating the subject for the neuropsychiatric condition using the given therapy based on the brain network activity pattern similarity score.
10. The apparatus according to claim 8 , wherein:
the computer processor is configured to construct the brain network activity pattern by constructing a brain network activity pattern using reference neurophysiological data, the reference neurophysiological data being electrophysiological signals acquired from a group of subjects, each applied with an initial pulse of transcranial magnetic stimulation.
11. The apparatus according to claim 8 , wherein:
(A) the computer processor is configured to construct the brain network activity pattern by constructing a brain network activity pattern that includes:
a plurality of nodes, each representing a comparison of features and relations among features in the electrophysiological signal to features and relations among features of reference neurophysiological data; and
connectivity weights assigned to respective pairs of nodes, and
(B) the computer processor is configured to construct the brain network activity pattern by constructing a brain network activity pattern in which each node represents a cluster of vectors of data characteristics, and the connectivity weights of each one of the respective nodes represents at least one cluster property describing a pair of clusters represented by said the respective pair of nodes.
12. The apparatus according to claim 1 , wherein the computer processor is further configured to calculate a power of a given frequency band within the detected electrophysiological signal, and the computer processor is configured to predict the outcome of treating the subject for the neuropsychiatric condition using the given therapy at least partially in response to the power of the given frequency band.
13. The apparatus according to claim 12 , wherein:
the computer processor is further configured to calculate powers of one or more additional frequency bands within the detected electrophysiological signal, and
the computer processor is configured to predict the outcome of treating the subject for the neuropsychiatric condition using the given therapy, based upon a combination of the power of the given frequency band and the powers of the one or more additional frequency bands.
14. The apparatus according to claim 13 , wherein the computer processor is configured to predict the outcome of treating the subject for the neuropsychiatric condition using the given therapy, based upon a ratio of the power of the given frequency band and the power of one of the one or more additional frequency bands.
15. The apparatus according to claim 12 , wherein the computer processor is configured to detect the electrophysiological signal of the subject by detecting an electroencephalography signal of the subject.
16. The apparatus according to claim 15 , wherein the computer processor is configured to calculate the power of the given frequency band within the detected electrophysiological signal by calculating a power of a low gamma band within the detected electroencephalography signal.
17. The apparatus according to claim 16 , wherein:
the computer processor is further configured to calculate a power of an alpha band within the detected electroencephalography signal, and
the computer processor is configured to predict the outcome of treating the subject for the neuropsychiatric condition using the given therapy, based upon a combination of the power of the low gamma band within the detected electroencephalography signal and the power of the alpha band within the detected electroencephalography signal.
18. The apparatus according to claim 1 , wherein the given time period is within 1-1000 ms of the applying of the one of the one or more pulses of transcranial magnetic stimulation to the subject, and the computer processor is configured to predict the outcome of treating the subject for a neuropsychiatric condition, using the given therapy, at least partially in response to the electrophysiological signal detected within 1-1000 ms of the applying of the one of the one or more pulses of transcranial magnetic stimulation to the subject, within a given train, in between successive pulses of transcranial magnetic stimulation.
19. A computer software product, for use with an output device, electrophysiological signal detecting electrodes, and a transcranial magnetic stimulation device, the computer software product comprising a non-transitory computer-readable medium in which program instructions are stored, which instructions, when read by a computer cause the computer to perform the steps of:
driving the transcranial stimulation device to apply one or more pulses of transcranial magnetic stimulation to a subject by driving the transcranial stimulation device to apply a plurality of trains of transcranial magnetic stimulation to the subject;
detecting an electrophysiological signal of the subject using the electrophysiological signal detecting electrodes within a given time period of applying one of the one or more pulses of transcranial magnetic stimulation to the subject, wherein the given time period occurs between successive pulses of a given train of transcranial magnetic stimulation;
at least partially in response to the electrophysiological signal detected within the given time period, predicting an outcome of treating the subject for a neuropsychiatric condition, using a given therapy; and
generating an output on the output device in response to the predicted outcome.
20. A method comprising:
applying one or more pulses of transcranial magnetic stimulation to a subject by driving a transcranial stimulation device to apply a plurality of trains of transcranial magnetic stimulation to the subject;
detecting an electrophysiological signal of the subject within a given time period of applying one of the one or more pulses of transcranial magnetic stimulation to the subject, wherein the given time period occurs between successive pulses of a given train of transcranial magnetic stimulation; and
at least partially in response to the electrophysiological signal detected within the given time period, predicting an outcome of treating the subject for a neuropsychiatric condition, using a given therapy.
21. The method according to claim 20 , wherein the given time period is within 1-1000 ms of the applying of the one of the one or more pulses of transcranial magnetic stimulation to the subject, and predicting the outcome of treating the subject for a neuropsychiatric condition, using the given therapy, comprises predicting the outcome of treating the subject for a neuropsychiatric condition, using the given therapy, at least partially in response to the electrophysiological signal detected within 1-1000 ms of the applying of the one of the one or more pulses of transcranial magnetic stimulation to the subject, within a given train, in between successive pulses of transcranial magnetic stimulation.