Table 1.

Correlation between input and interaction index in single glomeruli

PN interaction indexOSN input
DM2X1DM5DL5DM3X2X3VA1lm
DM2−0.170.120.380.10−0.020.14−0.140.29
X10.21−0.79*−0.69*0.33*−0.48−0.79*0.19−0.52
DM5*−0.76*0.170.12−0.670.10*−0.10−0.88*0.74*
DL50.21−0.36−0.100.26−0.50−0.240.05−0.19
DM3−0.29−0.36−0.070.10−0.43−0.36−0.260.00
X2−0.43−0.38−0.31−0.41−0.02−0.60−0.69*0.43
X30.48−0.21−0.100.83*−0.600.050.74*−0.71*
VA1lm0.48−0.76*−0.620.83*−0.71*−0.520.55−0.81*
  • Each cell shows the correlation coefficient calculated with the Spearman rank order correlation between the response in the OSNs and the interaction index in the PNs for all pairs of glomeruli. Asterisks show cases where the correlation was significant (p < 0.05). Correlation coefficients >0 indicate that the mixture suppression in the PNs increased with increased input. Correlation coefficients <0 indicate that the mixture suppression decreased with increased input. The former cases could be explained with inhibitory connections between the glomeruli. The latter cases could be explained with excitatory connections between the glomeruli (Fig. 5C).