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Fig. 4. Retrograde labeling of fin nerve branches in Sepia officinalis. (A) Drawing of fin nerve indicating dye-injected branches. One injection per branch, each in a different animal. (B) Sagittal section of a cephalopod brain (adapted from Novicki et al., 1990) with major areas labelled: supraesophageal mass (SupraEM), posterior subesophageal mass (PSEM), middle subesophageal mass (MSEM), anterior subesophageal mass [ASEM; composed of the brachial lobe (BRL) in Sepia]. Dye-labeled cells were located in the PSEM and BRL. (C) Diagram showing position of the stellate ganglion (SG), where a few cells were labeled. SG is in the dorsal mantle, and fin nerve branches (e.g. A1 and A2) are dorsal to the SG. Inset in A highlights the location (box) of the enlarged drawings in A (horizontal) and in C (vertical). A, anterior; P, posterior; D, dorsal.





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