Muscarinic receptors activity in the perirhinal cortex and hippocampus has differential involvement in the formation of recognition memory

► Scopolamine injections into perirhinal cortex or the hippocampus disrupted short-term object recognition memory. ► Scopolamine injections into perirhinal cortex disrupted long-term object recognition memory. ► Scopolamine injections in the hippocampus did not affect long-term object recognition memory.