Publication
Fabrication of flexible, implantable microelectrodes with embedded fluidic microchannels
Résumé
This paper describes the fabrication of polyimide-based microelectrodes with embedded fluidic microchannels. The thin-film structures combine for the first time a fluidic system with microelectrodes for recording and stimulation of biological signals on a flexible, implantable substrate. Microchannels were realized by a modified lamination technique and combined with a polyimide- platinum-polyimide sandwich structure. The probes can be used for monitoring cellular responses to various chemical stimuli delivered with high spatial precision.
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Concepts associés (16)
Neurostimulation
vignette|Implant cochléaire un appareil électronique qui stimule le nerf auditif grâce à des électrodes placées dans la cochlée de l'oreille interne, permettant à certaines personnes gravement sourdes de percevoir les sons. Pour les personnes souffrant de perte auditive sévère à profonde, les appareils auditifs implantables comme les implants cochléaires peuvent être une solution efficace La neurostimulation est la stimulation d'un nerf ou de plusieurs nerfs, de la moelle épinière ou d'une partie du cerveau (système nerveux central) à l'aide de neurostimulateurs.
Microelectrode array
Microelectrode arrays (MEAs) (also referred to as multielectrode arrays) are devices that contain multiple (tens to thousands) microelectrodes through which neural signals are obtained or delivered, essentially serving as neural interfaces that connect neurons to electronic circuitry. There are two general classes of MEAs: implantable MEAs, used in vivo, and non-implantable MEAs, used in vitro. Neurons and muscle cells create ion currents through their membranes when excited, causing a change in voltage between the inside and the outside of the cell.
Single-unit recording
In neuroscience, single-unit recordings (also, single-neuron recordings) provide a method of measuring the electro-physiological responses of a single neuron using a microelectrode system. When a neuron generates an action potential, the signal propagates down the neuron as a current which flows in and out of the cell through excitable membrane regions in the soma and axon. A microelectrode is inserted into the brain, where it can record the rate of change in voltage with respect to time.
Publications associées (32)
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Over the last decades, implantable neural interfaces have been extensively explored and effectively deployed to address neurological and mental health disorders. The existing solutions present several limitations. Firstly, the physical size of the implanta ...
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Implanted microelectrode arrays sense local neuronal activity, signals which are used as control commands for brain computer interface (BCI) technology. Patients with tetraplegia have used BCI technology to achieve an extraordinary degree of interaction wi ...
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