The Schwann Song of the Glia-less Synapse Erik M. Ullian, Ben A. Barres  Neuron  Volume 21, Issue 4, Pages 651-652 (October 1998) DOI: 10.1016/S0896-6273(00)80579-6

Figure 1 Schwann Cells Ensheath the Synaptic Terminal at the Frog Neuromuscular Junction Upon stimulation, synaptic vesicles fuse with the presynaptic membrane (1), move laterally along the presynaptic face (2), and are retrieved by endocytosis at the junction between the synaptic terminal and the Schwann cell (3) (figure modified from Heuser and Reese 1973). Neuron 1998 21, 651-652DOI: (10.1016/S0896-6273(00)80579-6)