API, not shown) are circled with dotted lines. Arrowheads point to
API, not shown) are circled with dotted lines. Arrowheads point to ribbon synapses, arrows demarcate conventional chemical synapses. Scale bar inside a,B: ten mm, C: 5 mm. doi:10.1371/journal.pone.0070373.gsynaptic layers, i.e.…