Figure 4.

Differential effect of beta and alpha1 agonist on between cells cross-correlations in the auditory cortex. Scattergrams representing the value of the mean cross-correlation obtained pre-drug application against the value obtained after drug application. Data are based on simultaneous recordings collected in less than 400 μm apart in layer III or IV of the guinea pig auditory cortex. (A) Isoproterenol, a classical Beta agonist, increased evoked activity but significantly decreased the value of between cell cross-correlations. (B) In contrast, Phenylephrine, a classical Alpha1 agonist, decreased evoked activity but had not significant effect on the value of between cell cross-correlations.