Abstract: Provided are are conformable conductors and electrode arrays and related methods of their manufacture and use. The disclosed structures can be implanted into or placed outside of the body of a subject to record biosignals and/or to deliver electrical stimulation, in addition to other, non-biological applications for electrical and/or chemical sensing and stimulation. One can form a pattern an absorbent material (e.g., with a laser cutter), which is later infused with a conductive ink that can include, e.g., MXene materials, reduced graphene oxide (rGO), graphene/graphite, gold, platinum, or other metallic nanoparticles, carbon nanotubes, conductive polymers, or other conductive ink materials. The resulting electrode arrays can be compatible with magnetic resonance imaging (MRI or fMRI) and transcranial magnetic stimulation (TMS) modalities, and the disclosed process can rapidly produce electrodes at high yield.

Abstract: An electrode, the electrode including an exposed contact surface, the exposed surface comprising a contact material, the contact material comprising a MXene. A device, the device including a plurality of electrodes, each of the plurality of electrodes comprising an exposed contact surface, the exposed surface comprising a contact material, the contact material comprising a MXene. A method, the method including delivering electrical stimulation to a subject with an electrode that comprises an exposed contact surface, the exposed contact surface comprising a contact material that includes a MXene.

Abstract: An implantable electrode for use in the body of a subject has a metal layer and a graphene passivation layer formed on at least a portion of the metal layer. The graphene passivation layer may be a single monolayer of graphene. A process for passivating an implantable electrode is also disclosed.

Abstract: Provided herein are biomedical devices and methods of making and using biomedical devices for sensing and actuation applications. For example, flexible and/or stretchable biomedical devices are provided including electronic devices useful for establishing in situ conformal contact with a tissue in a biological environment. The invention includes implantable electronic devices and devices administered to the surfaces(s) of a target tissue, for example, for obtaining electrophysiology data from a tissue such as cardiac, brain tissue or skin.

Abstract: Provided are electrodes that comprise MXene materials as well as related methods of using the disclosure electrodes in neural and other monitoring applications.

Abstract: A flexible, optically transparent electrode array comprises at least one graph electrode. The electrode may be positioned on a substrate. The flexible, optically transparent electrode may be used for simultaneous optical imaging and electrophysiological monitoring.

Abstract: The subject matter described herein relates to methods, systems, and computer readable media for visualization of a resection target during epilepsy surgery and for real time spatiotemporal visualization of neurophysiologic biomarkers. One exemplary method includes a real time neurophysiologic biomarker visualization system implemented by at least one computer, receiving, as input, a pre-electrode-implantation MRI of an epilepsy patient's brain.

Abstract: Provided are methods and devices for interfacing with brain tissue, specifically for monitoring and/or actuation of spatio-temporal electrical waveforms. The device is conformable having a high electrode density and high spatial and temporal resolution. A conformable substrate supports a conformable electronic circuit and a barrier layer. Electrodes are positioned to provide electrical contact with a brain tissue. A controller monitors or actuates the electrodes, thereby interfacing with the brain tissue. In an aspect, methods are provided to monitor or actuate spatio-temporal electrical waveforms over large brain surface areas by any of the devices disclosed herein.

Abstract: Provided is an implantable medical device for predicting and treating electrical disturbances in tissue. The medical device includes an implantable telemetry unit (ITU), and an implantable leads assembly including a first and a second electrode implanted in the tissue. A processor of the ITU is configured to perform training by receiving electrical signals input to the electrode circuit, parsing the electrical signals into dynamic event states using Bayesian Non-Parametric Markov Switching, and modeling each event state as a multi-dimensional probability distribution. The processor of the ITU is further configured to perform analysis of the electrical signals and therapy to the tissue by applying other electrical signals to the multi-dimensional distribution to predict future electrical disturbances in the tissue, and controlling the electrode circuit to apply an electrical therapy signal to the first and second electrodes to mitigate effects of the future electrical disturbances in the tissue.

Abstract: Provided herein are implantable biomedical devices and methods of administering implantable biomedical devices, making implantable biomedical devices, and using implantable biomedical devices to actuate a target tissue or sense a parameter associated with the target tissue in a biological environment.

Abstract: An implantable sensor array incorporates active electronic elements to greatly increase the number of sensors and their density that can be simultaneously recorded and activated. The sensors can be of various configurations and types, for example: optical, chemical, temperature, pressure or other sensors including effectors for applying signals to surrounding tissues. The sensors/effectors are arranged on a flexible and stretchable substrate with incorporated active components that allow the effective size, configuration, number and pattern of sensors/effectors to be dynamically changed, as needed, through a wired or wireless means of communication. Active processing allows many channels to be combined either through analog or digital means such that the number of wires exiting the array can be substantially reduced compared to the number of sensors/effectors on the array.

Abstract: A flexible, optically transparent electrode array comprises at least one graph electrode. The electrode may be positioned on a substrate. The flexible, optically transparent electrode may be used for simultaneous optical imaging and electrophysiological monitoring.

Abstract: Provided is an implantable medical device for predicting and treating electrical disturbances in tissue. The medical device includes an implantable telemetry unit (ITU), and an implantable leads assembly including a first and a second electrode implanted in the tissue. A processor of the ITU is configured to perform training by receiving electrical signals input to the electrode circuit, parsing the electrical signals into dynamic event states using Bayesian Non-Parametric Markov Switching, and modeling each event state as a multi-dimensional probability distribution. The processor of the ITU is further configured to perform analysis of the electrical signals and therapy to the tissue by applying other electrical signals to the multi-dimensional distribution to predict future electrical disturbances in the tissue, and controlling the electrode circuit to apply an electrical therapy signal to the first and second electrodes to mitigate effects of the future electrical disturbances in the tissue.

Abstract: An implantable sensor array incorporates active electronic elements to greatly increase the number of sensors and their density that can be simultaneously recorded and activated. The sensors can be of various configurations and types, for example: optical, chemical, temperature, pressure or other sensors including effectors for applying signals to surrounding tissues. The sensors/effectors are arranged on a flexible and stretchable substrate with incorporated active components that allow the effective size, configuration, number and pattern of sensors/effectors to be dynamically changed, as needed, through a wired or wireless means of communication. Active processing allows many channels to be combined either through analog or digital means such that the number of wires exiting the array can be substantially reduced compared to the number of sensors/effectors on the array.

Abstract: An implantable electrode for use in the body of a subject has a metal layer and a graphene passivation layer formed on at least a portion of the metal layer. The graphene passivation layer may be a single monolayer of graphene. A process for passivating an implantable electrode is also disclosed.

Abstract: An implantable sensor array incorporates active electronic elements to greatly increase the number of sensors and their density that can be simultaneously recorded and activated. The sensors can be of various configurations and types, for example: optical, chemical, temperature, pressure or other sensors including effectors for applying signals to surrounding tissues. The sensors/effectors are arranged on a flexible and stretchable substrate with incorporated active components that allow the effective size, configuration, number and pattern of sensors/effectors to be dynamically changed, as needed, through a wired or wireless means of communication. Active processing allows many channels to be combined either through analog or digital means such that the number of wires exiting the array can be substantially reduced compared to the number of sensors/effectors on the array.

Abstract: The subject matter described herein relates to methods, systems, and computer readable media for visualization of a resection target during epilepsy surgery and for real time spatiotemporal visualization of neurophysiologic biomarkers. One exemplary method includes a real time neurophysiologic biomarker visualization system implemented by at least one computer, receiving, as input, a pre-electrode-implantation MRI of an epilepsy patient's brain.

Abstract: Oscillatory signals may be used to determine a region of a patient's body that is associated with a medical condition. As described herein, oscillatory signals may be detected using a high sensitivity, low specificity detector. The oscillatory signals may be representative of discrete events in a patient's body. The detected signals may be tested in the context of surrounding background activity to identify anomalous discrete physiologic events that are sufficiently different from the surrounding background activity. The anomalous discrete physiologic events having correlative morphological, time, or location characteristics may be automatically clustered and clusters of anomalous physiologic events may be determined that are indicative of at least one region of the patient's body that is associated with a medical condition.

Abstract: An implantable sensor array incorporates active electronic elements to greatly increase the number of sensors and their density that can be simultaneously recorded and activated. The sensors can be of various configurations and types, for example: optical, chemical, temperature, pressure or other sensors including effectors for applying signals to surrounding tissues. The sensors/effectors are arranged on a flexible and stretchable substrate with incorporated active components that allow the effective size, configuration, number and pattern of sensors/effectors to be dynamically changed, as needed, through a wired or wireless means of communication. Active processing allows many channels to be combined either through analog or digital means such that the number of wires exiting the array can be substantially reduced compared to the number of sensors/effectors on the array.

Abstract: An implantable sensor array incorporates active electronic elements to greatly increase the number of sensors and their density that can be simultaneously recorded and activated. The sensors can be of various configurations and types, for example: optical, chemical, temperature, pressure or other sensors including effectors for applying signals to surrounding tissues. The sensors/effectors are arranged on a flexible and stretchable substrate with incorporated active components that allow the effective size, configuration, number and pattern of sensors/effectors to be dynamically changed, as needed, through a wired or wireless means of communication. Active processing allows many channels to be combined either through analog or digital means such that the number of wires exiting the array can be substantially reduced compared to the number of sensors/effectors on the array.