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Recording Quality I...
Recording Quality Is Systematically Related to Electrode Impedance
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- Lewis, Christopher M. (författare)
- Universität Zürich,University of Zürich
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- Boehler, Christian (författare)
- Albert-Ludwigs-Universität Freiburg,University of Freiburg
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- Liljemalm, Rickard (författare)
- Albert-Ludwigs-Universität Freiburg,University of Freiburg
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- Fries, Pascal (författare)
- Radboud Universiteit,Radboud University
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- Stieglitz, Thomas (författare)
- Albert-Ludwigs-Universität Freiburg,University of Freiburg
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- Asplund, Maria, 1978 (författare)
- Albert-Ludwigs-Universität Freiburg,University of Freiburg,Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- 2024
- 2024
- Engelska.
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Ingår i: Advanced healthcare materials. - 2192-2640 .- 2192-2659. ; In Press
- Relaterad länk:
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https://research.cha... (primary) (free)
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https://doi.org/10.1...
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https://research.cha...
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Abstract
Ämnesord
Stäng
- Extracellular recordings with planar microelectrodes are the gold standard technique for recording the fast action potentials of neurons in the intact brain. The introduction of microfabrication techniques has revolutionized the in vivo recording of neuronal activity and introduced high-density, multi-electrode arrays that increase the spatial resolution of recordings and the number of neurons that can be simultaneously recorded. Despite these innovations, there is still debate about the ideal electrical transfer characteristics of extracellular electrodes. This uncertainty is partly due to the lack of systematic studies comparing electrodes with different characteristics, particularly for chronically implanted arrays over extended time periods. Here a high-density, flexible, and thin-film array is fabricated and tested, containing four distinct electrode types differing in surface material and surface topology and, thus, impedance. It is found that recording quality is strongly related to electrode impedance with signal amplitude and unit yield negatively correlated to impedance. Electrode impedances are stable for the duration of the experiment (up to 12 weeks) and recording quality does not deteriorate. The findings support the expectation from the theory that recording quality will increase as impedance decreases.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Medicinteknik -- Medicinsk laboratorie- och mätteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Medical Engineering -- Medical Laboratory and Measurements Technologies (hsv//eng)
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Neurovetenskaper (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Neurosciences (hsv//eng)
Nyckelord
- flexible probes
- neurotechnology
- neural probes
- bioelectronics
- electrochemical impedance spectroscopy
- electrophysiology
- microelectrodes
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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