Fig. 12.

Filopodial extensions of mossy terminals are specialized to innervate GABAergic cells. Artistic rendition of two mossy terminals, each with four filopodial extensions (large arrowheads). All filopodial terminals contacted the dendrites or spines of six GABAergic neurons. Four of them were identified by their SPR-content and two of them by ultrastructural characteristics. Five of the six postsynaptic interneurons were spiny cells. All synapses were identified at the electron microscopic level (data not shown). Arrows point to the main axons.