Resolving the temporal dimension of neural coding via insect brain imaging.
Paoli M., Albi A., Antolini R., Haase A.
We use fast two-photon calcium imaging to study information coding in the brain of honeybees. Recording responses within the first neuronal network along the olfactory pathway, the antennal lobe, we investigate to what degree odour stimulus information is encoded in temporal features of the neuronal responses. Besides the well-studied response amplitude coding, we identified odour-specific oscillatory features. Furthermore, we found odour-specific variation of the response onsets of single network nodes. We show that these response latencies represent a general odour code. This allows the identification of an unknown test odour analysing only the order of activation of single network nodes.