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. Author manuscript; available in PMC: 2015 Aug 1.
Published in final edited form as: Exp Brain Res. 2014 May 28;232(8):2471–2481. doi: 10.1007/s00221-014-3985-y

Fig. 4.

Fig. 4

Proposed mechanism for CuSO4-induced nausea and emesis signaling in gastrointestinal (GI) vagal afferent fibers. EC = enteroendocrine cells in the mucosal layer of the GI tract.