Odour response patterns in the honeybee antennal lobe. a) Anatomical model of the honeybee AL (modified from ). Landmark glomeruli (17, 33, 42) are labelled according to the numbering from . b) Frontal view on the AL by calcium imaging. Above: Raw images (ratio: 340/380) from the movie. Below: Images processed with the real-time software. Glomeruli exhibit spontaneous background activity, or they respond to the odour during stimulus presentation (black bar).