摘要:
A multi-modal physiological assessment device and method enables the simultaneous recording and then subsequent analysis of multiple data streams of biological signal measurements to assess the health and function of the brain. Means and methods are provided to identify and leverage artifact samples within ID and 2D bio signal data streams to help create more accurate predictors and classifiers of brain health states and conditions. One sensor's data is used to gate the relevant portion of another bio sensor's data in order to reduce the noise and increase the signal-to-noise ratio. This is a form of phase locking for multimodal data streams for brain health assessment.
摘要:
A system and diagnostic signatures which are derived from the data collected in the system captures multiple streams of biological sensor data for assessing brain health and functionality of a user. The system includes a plurality of biological sensors adapted to collect biological sensor data from the user as well as the ability to stimulate the brain in a variety of sensory, cognitive, physical, and chemical challenges. Several of the biological sensors are accommodated in an electronics module mounted on the user's head.
摘要:
A system and method for assessing brain health includes presenting a saccade test to a subject and capturing biological sensor data of the subject in response to the saccade test using a plurality of biological sensors. Saccade cards are employed to measure the brain health of a subject through collection of eye tracking data, for example. Saccade cards using a variety of design elements besides numbers are used for collection of the eye tracking data and other biological data. The captured biological data is used to create a multi-variate signature of the brain health condition of the subject.
摘要:
A system for calibrating and/or verifying system performance of a remote portable EEG system having at least one EEG sensor. Embodiments of the invention can provide various reference signals to calibrate and quality control the remote performance of the data acquisition EEG system. In addition a calibration cable connects a reference signal source to the EEG sensors to enable remote calibration and quality control assessment. Further, a diagnostic biomarker is included to assess the state or function of a subject's brain and enables the classification, prognosis, diagnosis, monitoring of treatment, or response to therapy applied to the brain by measuring any one of a list of candidate features extracted from a given cognitive or sensory task, and measuring changes in the EEG feature and task combination over time, among multiple states, or compared to a normative database.
摘要:
A system and method for modeling bio-signals in the form of non-linear stochastic oscillators by extracting time series data from a subject into a series of summary fit parameters and comparing the unknown fit parameters to a set of normative fit parameters to determine whether the subject should be included in a group or not. The method includes data collection, feature extraction and then comparison of fit parameters from a non-linear stochastic oscillator model to a normative standard to make the in or out determination for a particular group. The system includes a processor programmed to perform the steps of the method.
摘要:
A method of extracting brain frequency sub bands corresponding to a medical condition such as Alzheimer's Disease from EEG time series data of a patient includes the steps of applying wavelet transforms to the EEG time series data to generate a continuous wavelet transformation time series at each wavelet scale, calculating Wavelet Entropy (WE) and Sample Entropy (SE) directly from the Continuous Wavelet Transformation time series at each wavelet scale, calculating arithmetic or geometric means and accumulations across scale ranges of interest; and selecting data from major brain frequency sub-bands as candidate sets of extraction features for analysis as a diagnostic signature for the medical condition. Diagnostic signatures for Alzheimer's disease are found when values of WE or SE are in certain ranges when EEG data is collected and analyzed in connection with certain analytical tasks such as an Eyes Open task.
摘要:
A multi-modal physiological assessment device and method enables the simultaneous recording and then subsequent analysis of multiple data streams of biological signal measurements to assess the health and function of the brain. The multi-modal assessment system includes at least one channel of EEG brainwave data in combination with cognitive information that provide a two-dimensional data stream of (x(t), y(t)) of cognitive information; voice recordings; motion, position, and stability data; galvanic skin conductance; temperature of the subject; pulse-oximetry data, cerebral blood perfusion data, vaso-motor reactivity data, and the like. The collected data is processed to construct candidate features extracted from multiple biological sensor data streams and correlated with multi-modal signatures to identify data indicative of brain health, disease and injury.
摘要:
A system and method for assessing the performance of a system for delivering a pharmaceutical agent to a portion of a body. A pair of electrodes are applied to the portion of the body. A pharmaceutical agent is infused into the portion of the body and the electrodes are energized by a signal generator, electrically stimulating the portion of the body. The voltage and current delivered to the portion of the body are measured using a data acquisition system thereby generating electrical parameter data. An immune response, gene expression level or other biological response to the pharmaceutical agent is measured and the electrical test data is correlated with the biological response to assess the performance of the system.
摘要:
A single diagnostic dose of a chemical agent that can bind with molecular specificity or provide a well characterized molecular effect on a mammalian host (including humans) is provided to a patient between brain scans. The method typically comprises at least one pre-dose scan of the subject followed by a waiting period then a second post-dose diagnostic scan. The diagnostic scans can be conventional in nature or of a multi-modal variety. A comparison, in the form of a difference or ratio, between data or extracted features before versus after the diagnostic dose indicates with molecular specificity the tone in the brain of that subject. The resulting data may be used to assess instances of medical fraud and can be used in back to work decisions for brain and soft tissue injuries for which the determinations have traditionally been somewhat subjective in nature.
摘要:
The present invention provides transgenic animals having an amyloid precursor protein wherein the amino acids flanking the &bgr; secretase cleavage site are NF and EV. The invention also provides tissues and cell lines derived from such animals. The invention further provides methods of screening candidate compounds to determine whether the compounds can alter the rate of cleavage of amyloid precursor protein by &bgr; secretase.