Thumbtack Probe with polyimide-epoxy composite shaft (1st generation)


These chronically implantable polyimide-epoxy composite shaft linear probes have multiple recording sites with a choice of 4, 8, 16, 24 and 32 electrode channels. Electrode sites are numbered from connector to tip. They are expertly handcrafted and made to order with many finished options available.

They are designed to span cortical layers running parallel to the surface of the brain. It is effective for both field potential and single-unit recordings, and is often used in medium to large animals like primates. Tip profile is rounded, dome-shaped.

The platinum/iridium recording sites are available in 15, 20, 25 and 40 µm diameter options.  The inter-electrode spacing can be 50, 75, 100, 150 or 200 µm along the length of the probe.

A thin, circular silicone sheet is attached at the top of the microelectrode, perpendicular to the axis of the probe, to hold the probe in place, while surface tension between the silicone sheet and the cortical surface assists in securing the probe in position. Output leads are bent at 90° at the top part of the anchoring sheet, and are then embedded in a 10 cm silicone cable/tube which terminates in an Omnetics connector.

These probes are exclusively sold worldwide (excluding Hungary) by Plexon Inc.

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