Publication

Very High Density Microelectrode Array with Monolithically Integrated Readout Circuits

Alexandre Schmid, Yusuf Leblebici, Neil Joye, Sedigheh Hashemi
2010
Conference Papers

Abstract

This paper presents the hardware realization and modeling of high-density microelectrode arrays including both microelectronic readout amplifiers as well as three-dimensional microelectrodes forming a fully integrated CMOS compatible system enabling research in electrophysiology. The presented chip offers the highest density of microprobes, reported in literature, all of which can be accessed through on-chip amplifiers, using a time-multiplexing scheme. An accurate model of the electrode interface including noise performance is also presented.

Official source

https://infoscience.epfl.ch/entities/publication/189cc773-3900-4127-90ea-2b85976f250a

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Alexandre Schmid, Yusuf Leblebici, Neil Joye, Sedigheh Hashemi
2010
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/189cc773-3900-4127-90ea-2b85976f250a

About this result

Related concepts (12)

Brain–computer interface

A brain–computer interface (BCI), sometimes called a brain–machine interface (BMI) or smartbrain, is a direct communication pathway between the brain's electrical activity and an external device, most commonly a computer or robotic limb. BCIs are often directed at researching, mapping, assisting, augmenting, or repairing human cognitive or sensory-motor functions. They are often conceptualized as a human–machine interface that skips the intermediary component of the physical movement of body parts, although they also raise the possibility of the erasure of the discreteness of brain and machine.

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.

Electroencephalography

Electroencephalography (EEG) is a method to record an electrogram of the spontaneous electrical activity of the brain. The biosignals detected by EEG have been shown to represent the postsynaptic potentials of pyramidal neurons in the neocortex and allocortex. It is typically non-invasive, with the EEG electrodes placed along the scalp (commonly called "scalp EEG") using the International 10–20 system, or variations of it. Electrocorticography, involving surgical placement of electrodes, is sometimes called "intracranial EEG".

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