This paper is the fortieth consecutive installment of the annual anthological review of
research concerning the endogenous opioid system, summarizing articles published during …

Background The detailed morphology and topography of the sympathetic cardiac nerves
(SCNs) and ganglia with their surrounding structures in Syrian hamsters were examined to …

Background No reports have been made on the entire extrinsic innervation of the heart in
small laboratory animals. Therefore, this study examined the detailed morphotopographic …