Table 1.
Physiology and morphology of eight alarm pheromone-sensitive uniglomerular projection neurons of the ant. (In the physiology column, + and − indicate that the neuron responded to that odour and did not respond, respectively. The ratio for the non-pheromonal odour indicates the number of odours to which the neuron responded per number of different kinds of odours tested. Neurons that exhibited only inhibitory responses to components of alarm pheromone were excluded. Medial soma belongs to medial soma cluster; the soma location was not specified. m-ACT, the axon of the neuron ascends through the medial tract. In the morphology column, + and − indicate that the axon of the neuron terminates in that area and does not terminate in that area, respectively. a lob, antennal lobe; ca, calyces of the mushroom body; l ho, lateral horn; v lob sat, satellite neuropil surrounding vertical lobe (or α lobe); d pr, dorsal protocerebrum; d lob, dorsal lobe.)
| neuron no. | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | |
|---|---|---|---|---|---|---|---|---|---|
| physiology | formic acid | + | + | + | + | − | + | + | + |
| n-undecane | − | − | − | − | + | + | + | + | |
| non-pheromone | 0/7 | 0/7 | 0/7 | 0/7 | 0/7 | 1/5 | 3/7 | 0/7 | |
| morphology | a lob | AS1 | AS1 | AS2 | AS2 | AS3 | AS4 | AS4 | AS5 |
| soma location | medial | medial | medial | medial | medial | medial | medial | medial | |
| ascending tract | m-ACT | m-ACT | m-ACT | m-ACT | m-ACT | m-ACT | m-ACT | m-ACT | |
| ca | + | + | + | + | + | + | + | + | |
| l ho | + | + | + | + | + | + | + | + | |
| v lob sat | − | − | − | − | − | − | − | − | |
| d pr | − | − | − | − | − | − | − | − | |
| d lob | − | − | − | − | − | − | − | − |