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Transcript
Single-unit recording
Single Unit Recording is the use of an electrode to record the
electrophysiological activity (action potentials) from a single neuron. The
electrode introduced into the brain of a living animal will detect electrical
activity that is generated by the neurons adjacent to the electrode tip. If the
electrode is a microelectrode, with a tip size of 3 to 10 micrometers, the
electrode will often isolate the activity of a single neuron. The activity consists
of the voltages generated in the extra cellular matrix by the current fields
outside the cell when it generates an action potential. Recording in this way is
generally called "single-unit" recording. The recorded action potentials look
very much like the action potentials that are recorded intracellularly, but the
signals are very much smaller (typically about 0.1 mV).