Lp. Nezlin et al., ENDOGENOUS OPIOIDS OF MODEL GASTROPODS - IMMUNOCYTOCHEMICAL IDENTIFICATION OF PEDAL NERVOUS ELEMENTS, Biologiceskie membrany, 9(10-11), 1992, pp. 1072-1074
In the subepithelial plexus of the sole, fine methionine enkephalin im
munoreactive (ME-ir) axons have been found in diverse pulmonates (Cepa
ea nemoralis, Helix pomatia, Deroceras reticulatum, Limax maximus, Lym
naea stagnalis) and prosobranchs (Acmaea sp., Littorina littorea). The
y seem to originate from neuronal cell bodies located in the CNS. Invo
lvement of pedal ME-ir elements in analgesic effects of endogenous opi
oids is discussed.