Relationship between AII AC input and AII AC oscillation. The AII AC receives excitatory inputs from two primary sources: RBC (magenta) and ON CBC via gap junction (cyan). The orange arrow represents an applied current. GJ, gap junction. The symbols correspond to the following references: *, Trenholm et al., 2012; **, Choi et al., 2014; **, Takeuchi et al., 2018.