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 33 for “"Neural recording"”.
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Ground truth in ultra-dense neural recording
While biologists routinely record neural activity with multi-electrodes, spike sorting-- the process of attributing spikes to particular neurons-- remains a challenge that typically requires human curation. Due to technical limitations, there have been very few multi-electrode recordings done in …
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Conducting polymer wires for intravascular neural recording
… to demonstrate the feasibility of an all-polymer neural recording electrode, and were shown to give high-fidelity intravascular recordings. Polyaniline nanowires were then fabricated by coaxial electrospinning, which was shown to be a viable technique for the manufacture of such wires. These wires …
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Carbon fiber electrodes for in vivo neural recording
Multi-channel micro electrodes for neural recording is a growing field that thrives on novel materials and fabrication techniques offered by micro fabrication technology. The material and the design of microelectrodes have a critical role on the quality of neural signals recorded. The neural …
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Development of extracellular electrophysiology methods for scalable neural recording
In order to map the dynamics of neural circuits in mammalian brains, there is a need for tools that can record activity over large volumes of tissue and correctly attribute the recorded signals to the individual neurons that generated them. High-resolution neural activity maps will be critical for …
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Design of an Embedded Fluorescence Imaging System for Implantable Optical Neural Recording
… tive on the study of the functional brain at a neural circuit level, enabling in-depth understanding of both physiological processes and animal models of neurological and psychiatric diseases which currently lack e↵ective treatments. These new tools come at the cost of meeting the challenges …
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An ultra low power implantable neural recording system for brain-machine interfaces
In the past few decades, direct recordings from different areas of the brain have enabled scientists to gradually understand and unlock the secrets of neural coding. This scientific advancement has shown great promise for successful development of practical brain-machine interfaces (BMIs) to …
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Wireless Neural Recording and Stimulation SoCs for Monitoring and Treatment of Intractable Epilepsy
… epilepsy. The first prototype SoC is a neural recording interface intended for wireless monitoring of intractable epilepsy. The 0.13um CMOS SoC has 64 recording channels, 64 programmable FIR filters and an integrated 915MHz FSK PLL-based wireless transmitter. Each channel contains a …
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An ultra-low-power neural recording amplifier and its use in adaptively-biased multi-amplifier arrays
The design of a micropower energy-efficient neural recording amplifier is presented. The amplifier appears to be the lowest power and most energy-efficient neural recording amplifier reported to date. I describe low-noise design techniques that help the neural amplifier achieve an input-referred …
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In Situ Perturb-Seq of Transcriptomes and RNA Neural Recordings
… explore the intersection of in situ sequencing, neural recording, and CRISPR screens. An intracellular technology is outlined for encoding neural activity in the form of RNA, theoretically enabling single-cell resolution recording of whole-brain activity. This neural recording system can be …
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Decoding Neural Processing of Linguistic Features From Large-Scale Intracranial Recordings and Naturalistic Language Stimuli
… in the brain, utilizing high-resolution neural recording. Using data from the Brain TreeBank, a large-scale multimodal dataset of recorded brain activity, we fit Generalized Linear Models (GLM) to map language and vision stimuli to induced brain activity. This framework allows us to …
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Modulating Neuroinflammation with Porous Templated Scaffolds
… injury, stroke, or limb loss. However, unstable neural recording performance remains unresolved. Via the foreign body reaction, macrophages and glial cells develop a “glial scar” around implants, increasing electrode impedance and leading to time-dependent declines in electrode performance. …
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A modular neural interface for massively parallel recording and control : subsystem design considerations for research and clinical applications
… on this information, and selectively perturb neural dynamics in the brain for therapeutic benefit to the patient. Such systems have immediate application to treatment of paralysis, epilepsy and the amputated, and the potential for treatment of higher order cognitive dysfunction. Despite the …
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Design and modeling of wireless link for biomedical implantable applications
… implantable antenna for data transfer in neural recording system and evaluates the performance of a novel differential antenna in MICS and ISM bands for dual-mode operation. Also, the interference issues between the power link and data link are examined as well.
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Design of High-Resolution SAR ADC for Detection of Sub-Cortical Neuron Action Potentials for BMI Applications
… of brain-machine interfaces (BMIs) requires neural signal acquisition systems that are capable of resolving both fast, low-amplitude action potentials (APs) and slow, higher-amplitude local field potentials (LFPs) under stringent power and area constraints. This thesis presents the design and …
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Functional thin film polymers for biopassivation of neuroprosthetic implants
… Central to this field is the ability to implant neural recording probes within the brain that will remain functional over the life of the patient. In this work, two novel polymeric materials for use in biopassive neural probe coatings have been developed and validated. These polymers are …
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Evaluating the biostability of polypyrrole microwires
… and the study of the brain. Currently long term neural recording is precluded by the formation of scar tissue around the electrodes inserted into the brain. Conducting polymers present a possible solution to this problem as their biocompatibility and low stiffness could improve the quality of the …
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An energy-efficient wireless data link for implantable electronics
… for the development of long-term implantable neural prostheses. Furthermore, in implanted systems with many neural recording electrodes, the data rate of the wireless link will need to be quite high since each recording electrode can produce about 120 kbps of data. For low-power operation, …
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Flexible fibers for optoelectronic probing of spinal cord circuits
The majority of the neural engineering efforts in the past decade have focused on brain interfaces. The searching of tools for recording and modulation of neural activity in the spinal cord limits fundamental understanding of neural dynamics in this organ. Spinal cord poses a challenge to probe …
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Dual-Band Power and Communication Antennas for Wireless Brain-Computer Interfaces
… as wireless brain-computer interfaces (BCIs) for neural recording and stimulation face two key challenges: (1) remaining powered over a long duration and (2) communicating with an external system with sufficient bandwidth in an unconstrained environment without data dropouts. A viable solution to …
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A High-Precision Bioelectric Neural Interface Toward Human-Machine Symbiosis
… underlying a new class of bioelectric neural interfaces that could bring us one step closer to this feat. We pioneer new circuit techniques, including frequency shaping (FS), redundant sensing (RS), RS-based super-resolution, and redundant crossfire (RXF), to enhance the effective …
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