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Fig. 8 | BMC Zoology

Fig. 8

From: Histamine and gamma-aminobutyric acid in the nervous system of Pygospio elegans (Annelida: Spionidae): structure and recovery during reparative regeneration

Fig. 8

Schematic representation of HA- and GABA-like elements in the anterior part of Pygospio elegans nervous system. The main nerve tracts of the central nervous system are outlined in grey. a HA-like elements (dorsal view). b GABA-like elements (dorsal view). c HA-like elements (ventral view). d GABA-like elements (ventral view). Abbreviations: cc – circumesophageal connectives, dc – dorsal cerebral commissure, drcc – dorsal roots of the circumesophageal connectives, dn – dorsal longitudinal nerve, ln – lateral longitudinal nerve, nn – nuchal nerve, no – nuchal organs, npc – non-receptor palp nerve cells, pa – palps, pcp – posterior commissure of the prostomium, phn – pharyngeal nerves, pln – palp nerve, pn – parapodial nerve, prc – palp receptor cells, sgn – stomatogastric nerve, sog – subesophageal ganglion, vc – ventral cerebral commissure, vnc – ventral nerve cord, vrcc – ventral root of circumesophageal connectives

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