All of the evidence provided on Hippocampome.org are quotes from scientific texts.
However, because quoted passages may be difficult to understand in isolation, contextual information and expanded abbreviations set in square brackets have been added for clarity.
"Some well characterized interneurons are, however, covered densely by dendritic spines. These are the hippocampal O-LM [oriens-lacunosum moleculare] and the dentate
gyrus hilar perforant path-associated (HIPP) cells. Both cell types contain the neuropeptide somatostatin; and their dendrites, with prominent spines, can be visualized by immunostaining against mGluR[metabotropic glutamate receptor]1, substance P receptors, or in some cases calretinin (Freund and Buzsaki, 1996)."