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Figure 1


Fig. 1. The isolated brain stem of the shark Iago omanensis. (A) Careful removal of the cartilage skull completely exposed the brain stem (white circle), the cerebellum (green circle) and the cervical spinal cord (yellow circle). (B) Top view of the shark's isolated brain stem. The black and yellow lines outline the DON and the dorsal granular ridge (DGR), respectively. (C) Side view of the shark's isolated brain stem where the DON is marked by black line. (D) Schematic drawing of the isolated preparation, showing the relative locations of the stimulating and the recording electrodes. PF, parallel fibers; Aff, afferent nerve. Scale bars in A–C, 1 mm.