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. Author manuscript; available in PMC: 2021 Oct 19.
Published in final edited form as: Handb Behav Neurosci. 2020 Mar 31;26:161–212. doi: 10.1016/B978-0-12-815134-1.00008-8

FIG. 5.

FIG. 5

Electron micrographs of MOR+ spines. Arrowheads indicate examples of particulate MORir. (A) A MOR+ spine (M-Sp) forms an asymmetrical synaptic contact (arrow) with an unlabeled terminal (U-t). (B) A MOR+ spine receives an asymmetrical synaptic contact from an unlabeled terminal (arrow). Three unlabeled spines (asterisks) also receive asymmetrical synaptic contacts from unlabeled terminals. Scale bars=0.5μm. From Zhang, J., & McDonald, A. J. (2016). Light and electron microscopic analysis of enkephalin-like immunoreactivity in the basolateral amygdala, including evidence for convergence of enkephalin-containing axon terminals and norepinephrine transporter-containing axon terminals onto common targets. Brain Research, 1636, 62–73. doi:10.1016/j.brainres.2016.01.045, with permission.