Electrode Sharpener

Research need:  An important technique used by neurophysiologists interested in learning and memory is multi-unit in-vivo recording.  Recordings are made by inserting extremely delicate sharpened tungsten wires or electrodes into the relevant regions of the brain during behavioral tests.  Electrodes that are dull or uneven result in poor-quality recordings.  This electrode dipper was developed for an Indiana University investigator who required extremely sharp and symmetrical electrodes (beyond conventional limits) for an experiment about the association between sensory perception, synaptic processing, and encoded information. Unit specifications: 

• Aluminum plate with stainless steel rods and linkage used for sharpening tungsten electrodes.

• Current controller and counter box.

• Planetary gear system with electric motor and gear box.

• Uses small electric current in an acid bath to etch the electrode to a sharp point.