Investigating the Underlying Intelligence Mechanisms of the Biological Olfactory System
Figure 1
Slug’s brain. (a) The Japanese giant terrestrial slug Incilaria fruhstorferi. A pair of superior tentacles (STs) can be seen at the head end. A part of the left inferior tentacle (l_IT) can be seen close to the base of the left ST. Scale bar: 5 cm. (b) Gross anatomy of the slug brain, cerebral ganglia. Left and right sides show dorsal and ventral views of the cerebral ganglia, respectively. The cerebral ganglion is divided into three lobes: the procerebrum (PC), mesocerebrum (MsC), and metacerebrum (MtC). Olfactory information received at the tips of STs and ITs reaches the brain through superior and inferior tentacle nerves (STNs and ITNs, resp.). See [26] for details. (c) Anatomical projections of fibers from STN (blue arrows) and ITN (red arrows). Both ST and IT send olfactory information into PC (left panel) and to the medial region of MtC (right panel). (d) Schematic illustration of anatomical olfactory projections from ST and IT in the brain. Figures 1(b) and 1(c) are adapted and modified, with permission, from [34] 2006 IEEE.
