Up until now, researchers who wanted to observe neuronal activity in real - time often used a technique
called calcium imaging.
But using a technique
called calcium imaging, Aoki et al. were able to visualize for the first time the activity of the whole zebrafish brain during memory retrieval.
To image the neurons firing, the researchers used a technique
called calcium imaging that creates fluorescence in response to the influx of calcium that occurs when a neuron fires.