Brain surgeon Ben Rapoport described to me how his father (a neuroscientist) did
Description
Brain surgeon Ben Rapoport described to me how his father (a neuroscientist) did microelectrodes: "When my father did electrodes, he did it manually. He took a very thin wire - gold, platinum or iridium, which was 10-30 microns in diameter and inserted this wire into a glass capillary tube with a diameter of a millimeter. Then he held this glass over fire and rotated until the glass became soft. He pulled out the capillary tube until it became very thin, and pulled out of the fire. Now the capillary tube wraps and squeezes the wire. Glass-insulator, and wire-conductor. As a result, an electrode isolated in the glass with a tip tip of 10 microns is obtained. " Although today some electrodes are still manufactured by hand, new technologies use silicon substrates and manufacturing technologies borrowed from the integrated circuit industry. The way the local field potentials work is simple - you take one such ultra-thin needle with an electrode tip and insert it one or two millimeters into the bark.
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