Figure 11.
Electron micrographs illustrating the density of asymmetric synapses onto a PV-labeled dendrite which also contains D1-IR. PV immunogold is present throughout the serial sections of this dendrite and is indicated by black arrowheads in panel (A). D1-IR associated with the plasma membrane is present in panels (B and C) (white arrows). Over a total perimeter length of 19.8 μm, this PV-labeled dendrite received 7 asymmetric synapses (white asterisks) and has a density of 0.35 asymmetric synapses per micron of dendritic perimeter. One of the axon terminals making a synaptic contact onto this PV-labeled dendrite also contains D1-IR associated with the plasma membrane (white arrow, panel F).