Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 26 for “"Neural stimulation"”.
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A miniature, implantable wireless neural stimulation system
… this thesis, I present the design of a wireless neural stimulation system. The system consists of an external transmitter, controllable through a computer interface, and a miniature, implantable wireless receiver and stimulator. The implant is tailored for use in zebra finches - small birds …
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INFRARED NEURAL STIMULATION AND FUNCTIONALRECRUITMENT OF THE PERIPHERAL NERVE
… entail independent control over each neuron. Neural interfaces based on electrical stimulation of neurons have made the most progress in restoring movement in paralyzed limbs, but increasing selectivity without increasing invasiveness remains a primary goal in developing stable and chronic …
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A system for efficient neural stimulation with energy recovery
An analog VLSI-based low-power neural tissue stimulator is presented as a part of the MIT and Massachusetts Eye and Ear Infirmary Retinal Implant Project to develop a prosthesis for restoring some useful vision to patients blinded by retinal degeneration. Such a prosthesis would receive image data …
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Low power circuits and systems for wireless neural stimulation
Electrical stimulation of tissues is an increasingly valuable tool for treating a variety of disorders, with applications including cardiac pacemakers, cochlear implants, visual prostheses, deep brain stimulators, spinal cord stimulators, and muscle stimulators. Brain implants for paralysis …
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The application of FEM technique to electromagnetic models for magnetic neural stimulation
Several aspects of magnetic neural stimulation are investigated by applying an advanced finite-element analysis. The objective is to demonstrate that the finite element method is well suited for realistic bio-electromagnetic modelling. The focus of our research is to explore four factors which …
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Microsystem Based on CMOS Multielectrode Array for Extracellular Neural Stimulation and Recording
… structural and functional information from neural circuitry. Conventional electrophysiological stimulation and measurement technique such as patch clamping have become the standard techniques for accurate stimulation and recording of electrical activities in neurons. Nevertheless, the number …
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Development Of Carbon Based Neural Interface For Neural Stimulation/recording And Neurotransmitter Detection
<p>Electrical stimulation and recording of neural cells have been widely used in basic neuroscience studies, neural prostheses, and clinical therapies. Stable neural interfaces that effectively communicate with the nervous system via electrodes are of great significance. Recently, flexible neural …
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NeuralSTA: a software tool for neural stimulation and recording applications with a laser control
… thesis is a software tool created in Matlab for neural stimulation and recording of the evoked potentials. The stimulation output can be delivered in electrical units for immediate use for neural stimulation or as a power control signal to a laser. NeuralSTA is designed to generate arbitrary …
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An asynchronous,low-power architecture for interleaved neural stimulation, using envelope and phase information
… processor chip and a charge-balanced stimulation chip that together form a complete processing-and-stimulation cochlear-implant system. The processor chip uses a novel Asynchronous Interleaved Stimulation (AIS) algorithm that preserves phase and amplitude cues in its spectral input …
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High-Voltage Compliant, Electrode-Invariant Neural Stimulation Electronics Compatible with Low-Voltage, Bulk-CMOS Integration
… challenges of implementing practical, electrical neural stimulation interfaces using modern silicon CMOS technologies. To overcome said challenges, which stem from the discrepancy between the low-voltage limitations of modern CMOS devices and the large stimulation voltages often observed at …
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Characterization and connectorization of optoelectronic neural probes
… use of flexible polymer and polymer composite neural stimulation and recording systems. Furthermore, recent advances in optical neural stimulation methods would benefit from seamless integration of optical waveguides into neural probes. In this thesis, we describe electronic and optical …
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New technologies for neuromodulation
Non-invasive neural stimulation techniques are of increasing importance as devices move from the lab to the clinical environment. One such technology-transcranial magnetic stimulation-has already made the transition and is currently used by clinicians to treat depression. This device has several …
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An implantable piezoelectric ultrasound stimulator (ImPULS) for selective deep brain activation
Precise neurostimulation has potential to revolutionize therapies for neurological disorders. However, current neural interfaces targeting the deep brain face significant limitations in spatial resolution and potency due to tissue attenuation. We developed an implantable piezoelectric ultrasound …
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Self-standing sub-cellular sized PhotoVoltaic devices for minimally-invasive and precise Neuronal Stimulation
Neural stimulation is an important research tool for diagnosis, monitoring and therapeutics. It helps in deciphering neural connections and improving our understanding of how different parts of the brain works. In this thesis work, I will be discussing about designing for the first time …
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Ultra-low-power circuits and systems for wearable and implantable medical devices
… system design and energy-efficient neural stimulation for a proof-of-concept fully-implantable cochlear implant. First, implantable acoustic sensing is demonstrated by sensing the motion of a human cadaveric middle ear with a piezoelectric sensor. Second, alternate energy-efficient …
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Opto-mechanical control of nerve growth
… neurotrophic factors, topography, and electrical stimulation have been proposed to enhance nerve growth. This thesis explores optogenetic neural stimulation as a means to control neurite growth that promises greater cell-type specificity than commonly used electrical stimulation. Using dorsal root …
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An implantable micro-system for neural prosthesis control and sensory feedback restoration in amputees
… Circuits (ICs): a standard CMOS device for neural recording and a High Voltage (HV) CMOS device for neural stimulation. The integrated circuits have been realized in two different 0.35μm CMOS processes available fromAustriaMicroSystem(AMS). The recoding IC incorporates 8 channels each …
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In vitro feasibility testing of floating light-activated minroelectrical stimulators
One of the major challenges of neural stimulation is the mechanical stress and resulting trauma induced on the implanted electrodes by the constant movement of the interconnects. A potential way of eliminating interconnects is to use floating micro-stimulators that can be activated through optical …
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Muscle Recruitment Mechanism under Optogenetic Neuromodulation
… overall quality of life. Functional electrical stimulation (FES) is the most commonly used technology to restore motion. Although FES is used extensively in the clinic, several drawbacks limit its application for long-term use. FES recruits larger motor units before smaller ones, causing muscles …
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A MATLAB-Based Subject-Specific Framework for Vessel Quantification and Localization in Longitudinal Photoacoustic Neuroimaging
… responses, at single vessel resolution, to neural stimulation. However, existing approaches do not provide a unified and systematic framework for consistently localizing vessels and quantifying vessel related functional responses across multiple sessions from the same subject in a …
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