Abstract
A system for obtaining chronic unit recording from cortical and subcortical neurons in unrestrained cats is described. This system has been used and tested in a population of trained animals for several years, and possesses the following major advantages: the microelectrode may be easily changed in the event that it becomes damaged or if a longer traverse is desired; it has proved feasible to maintain stable records from the same population of cells for as long as 14 days; the electrode can be moved through the brain of the conscious animal, affording the opportunity to map a large number of different cells in the same individual. Details of the construction of reliable glass-insulated platinum-iridium microelectrodes are presented.
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