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. 1998 May 1;18(9):3386–3403. doi: 10.1523/JNEUROSCI.18-09-03386.1998

Fig. 7.

Fig. 7.

Terminal types of mossy fibers in the hilus. All electron micrographs have the same magnification. A, Mossy terminal establishing four synapses (arrows) with the shaft and the thorny excrescences of a mossy cell. Curved arrows point to the filopodiae originating from this terminal.B, A small en passant terminal with single release site (arrow) contacts a dendritic shaft.C, A drumstick-like small terminal forms a synapse on the proximal part of an SPR-positive spine. Open arrowsin B and C label synapses formed by unlabeled small terminals. D, E, Intermediate terminal type contacting a distal SPR-positive dendritic shaft (arrow in D) and on a neighboring section forming two synapses (arrows inE) on a putative mossy cell. Scale bars:A, 1 μm; B–E, 0.5 μm.