Figure 3.
Activation of group I metabotropic gluatamate receptors generate suprathreshold depolarizations in somatostatin-expressing interneurons targeting layer I. A: example of an interneuron responding with firing to DHPG (10 μM) application recorded in a slice prepared from a CXCR4-EGFP mouse. B: similar result obtained from a DHPG responding EGPF-expressing cell in a slice obtained from a P8 GIN mouse. C: anatomical properties of the cell shown in B reveal it for a young Martinotti interneuron. Notice the localization of its soma in the lower layers and the dense axonal arborization and extensive targeting of layer I (gray). D: firing pattern of the cell shown in B and C. Current steps were +100 pA (upper trace) and +40 pA and −100 pA (lower traces).