Comprehensive Example #2: Neuronal Spike Visualization
Neurons in the brain convey information by firing spikes (also known as action potentials). By placing a wire probe near a neuron, it is possible to record its electrical potential and thus determine when the neuron fired. These spiking events can be related to the behavior of an animal during a task. This is a fundamental technique in cognitive neuroscience.
A recent advancement in extracellular recording is the invention of the tetrode by Bruce McNaughton and colleagues at the University of Arizona. A tetrode is a twisted set of four wires that can be used to resolve the activities of up to 20 neurons simultaneously. The idea is that if a tetrode sits in a bed of neurons, different neurons ...
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