Confocal images of biocytin-labeled ACC neurons with functional connections. (A-C) Two pyramidal cells (a and b) show the possible synaptic contacts. The rectangular area in A is shown in B with a higher magnification. C is the three-dimensional view of the rectangular field in B, in which an axon from cell (a) makes close connections with two dendrites from cell (b). Arrows show the axon varicose swellings and blank and filled triangles show the dendrite spines. (D-F) One interneuron (a') makes close contact with one pyramidal cell (b'). The rectangular area in D is shown in E with a higher magnification. F is the three-dimensional view of the rectangular area in E, in which an axon from cell (a') makes close connections with one dendrite from cell (b'). Bars equal to 50 (A and D), 20 (B and E) and 5 (C and F) microns, respectively.
Wu et al. Molecular Brain 2009 2:32 doi:10.1186/1756-6606-2-32