Fig. 9.

Convergence and divergence of granule cell contacts on hilar mGluR1a-positive neurons. Camera lucida reconstruction of three hilar mGluR1a-immunoreactive neurons from six 60-μm-thick sections, innervated by the two granule cells shown in Figure 8. Neuron 1 received a single contact from one of the granule cells (black arrowhead); both granule cells converged onto neuron 2 with single contacts each (black and gray arrowhead), whereas neuron 3 was innervated by two terminals of the other granule cell (gray arrowheads). Correlated electron micrographs of the contacts are shown in Figure 10.