Fig. 9.1B. An enlargement of part of Fig. 9.1. In the center of the micrograph is a dendritic spine (grey), which is synapsing with an axon terminal (light green) containing round synaptic vesicles that is forming an asymmetric synaptic junction. Another axon terminal (dark green) contains pleomorphic synaptic vesicles, and is forming a symmetric synaptic junction with the same dendritic spine. Other axon terminals in the fields are also forming asymmetric or excitatory synapses with dendritic shafts or spines.
