The Irresistible Visual Cue
The zebrafish larvae could not resist this cue: They followed it around for hours, apparently confusing the moving dot with a real conspecific. The researchers had thus discovered a defined visual stimulus that triggers shoaling behavior.
The team could now investigate the neuronal processing of the stimulus. The experiments revealed that a moving dot activates a specific set of neurons in a brain region known as the thalamus. The same area of the thalamus gets activated when another zebrafish larva swims nearby.
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A special network that runs from the eye’s retina deep into the brain may help mediate social attraction and affiliation, a new study reveals. It seems that “to see is to know”. But how would we feel about that if it partly or wholly explained our social behavior and relationships? What if we were the zebrafish of the experiment?
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