A5002918047- EEG and Brain-Computer Interfaces
- Transcranial Magnetic Stimulation Studies
- Pain Management and Treatment
- Neuroscience and Neural Engineering
- Muscle activation and electromyography studies
- Tactile and Sensory Interactions
- Gaze Tracking and Assistive Technology
- Stroke Rehabilitation and Recovery
- Pain Mechanisms and Treatments
- Advanced Sensor and Energy Harvesting Materials
- Spinal Cord Injury Research
- Botulinum Toxin and Related Neurological Disorders
- Musculoskeletal pain and rehabilitation
- Neurological Disease Mechanisms and Treatments
- Neural and Behavioral Psychology Studies
- Telemedicine and Telehealth Implementation
- Advanced Memory and Neural Computing
University of Pittsburgh
2019-2024
Pittsburg State University
2021
Center for the Neural Basis of Cognition
2021
Carnegie Mellon University
2021
Battelle
2018
A wearable electrode array and machine learning methods were used to record decode myoelectric signals motor unit firing in paralyzed muscles of a person with complete tetraplegia. The activity rates task specific, even the absence visible motion, enabling accurate classification attempted single-digit movements. This system has potential enable people tetraplegia control assistive devices through movement intent.
This is a protocol for an experiment to characterize the recruitment and maintenance of action potential firing in Aα/β-fibers generated during tonic dorsal root ganglion stimulation (DRGS) applied over range clinically relevant parameters. will result data describing Aα/β-fiber activation thresholds due each stimulus parameter. Data showing whether evoked responses changed extended periods assess time necessary ECAP amplitude fully recover DRGS. As well as measuring latency width at...
Laboratory demonstrations of brain-computer interface (BCI) systems show promise for reducing disability associated with paralysis by directly linking neural activity to the control assistive devices. Surveys potential users have revealed several key BCI performance criteria clinical translation such a system. Of these criteria, high accuracy, short response latencies, and multi-functionality are three characteristics impacted decoding component system, algorithm that translates into...
Understanding the long-term behavior of intracortically-recorded signals is essential for improving performance Brain Computer Interfaces. However, few studies have systematically investigated chronic neural recordings from an implanted microelectrode array in human brain.In this study, we show applicability wavelet decomposition method to extract and demonstrate utility stable features obtained a motor cortex with tetraplegia. Wavelet was applied raw voltage data generate mean power (MWP)...
We are developing a wearable neural interface based on high-density surface electromyography (HDEMG) for detecting and decoding signals from spared motor units in the forearms of people with tetraplegia after spinal cord injury (SCI). A lightweight, form-fitting garment containing 150 disc electrodes covering entire forearm was used to map myoelectric activity muscles during wide range voluntary tasks person chronic SCI (C5 C6 sensory American Spinal Injury Association Impairment Scale B...
In this study, we aimed to characterize the recruitment and maintenance of action potential firing in Aα/β-fibers generated during tonic dorsal root ganglion stimulation (DRGS) applied over a range clinically relevant parameters.
Abstract Objective . The goal of this work was to compare afferent fiber recruitment by dorsal root ganglion (DRG) stimulation using an injectable polymer electrode (Injectrode ® ) and a more traditional cylindrical metal electrode. Approach We exposed the L6 L7 DRG in four cats via partial laminectomy or burr hole. stimulated Injectrode stainless steel (SS) biphasic pulses at three different pulse widths (80, 150, 300 μ s) amplitudes spanning range used for clinical stimulation. recorded...
Abstract Trial-by-trial texture classification analysis and identifying salient related EEG features during active touch that are minimally influenced by movement type frequency conditions the main contributions of this work. A total twelve healthy subjects were recruited. Each subject was instructed to use fingertip their dominant hand’s index finger rub or tap three textured surfaces (smooth flat, medium rough, rough) with levels (approximately 2, 1 0.5 Hz). force data collected...
Modern approaches to providing haptic feedback focus mainly on robotic manipulators, vibrators, and tactors. This type of tends be cumbersome limited a small number contact points. On the contrary, electrotactile displays are compact wearable, recent discoveries demonstrate that naturalistic sensations touch can provided by electrical stimulation peripheral nerves. Haptic is essential for daily activities, as it allows us become aware our surroundings. The aim this study develop techniques...
Abstract Motor neurons in the brain and spinal cord convey information about motor intent that can be extracted interpreted to control assistive devices, such as computers, wheelchairs, robotic manipulators. However, most methods for measuring firing activity of single rely on implanted microelectrodes. Although intracortical brain-computer interfaces (BCIs) have been shown safe effective, requirement surgery poses a barrier widespread use. Here, we demonstrate wearable sensor array detect...
This is a protocol for an experiment to compare afferent fiber recruitment by dorsal root ganglion (DRG) stimulation using injectable polymer electrode (Injectrode‱) and more traditional cylindrical stainless steel electrode. will result in data describing the rate evoked compound action potentials (ECAP) of Aα, Aβ, Aδfibers due at different pulse widths versus Injectrode. also on impedance values both electrodes.
ABSTRACT Objective The goal of this work was to compare afferent fiber recruitment by dorsal root ganglion (DRG) stimulation using an injectable polymer electrode (Injectrode ® ) and a more traditional cylindrical metal electrode. Approach We exposed the L6 L7 DRG in four cats via partial laminectomy or burr hole. stimulated Injectrode stainless steel biphasic pulses at three different pulse widths (80, 150, 300 μs) amplitudes spanning range used for clinical stimulation. recorded antidromic...
Chronic pain affects millions of people in the United States and pharmacological treatments have been ineffective. Dorsal root ganglion (DRG) stimulation is a neuromodulation method that delivers electrical to DRG relieve pain. electrodes are rigid cylindrical. The implantation requires technically-challenging surgery involves steering laterally towards DRG. Injectrode an injectable conductive polymer cures place capable delivering current stimulate neural tissue. We used L6 L7 cats,...