This article reports on three case studies that explore the person-place relationships that occur on an ecoregional scale and whether and how those place connections relate to residents undertaking action on issues about which they report being concerned. The research was conducted in three ecoregions of high priority for conservation: the Galapagos Islands (Ecuador), the Klamath-Siskiyou (nort...

During pauses in exploration, ensembles of place cells in the rat hippocampus re-express firing sequences corresponding to recent spatial experience. Such "replay" co-occurs with ripple events: short-lasting (approximately 50-120 ms), high-frequency (approximately 200 Hz) oscillations that are associated with increased hippocampal-cortical communication. In previous studies, rats exploring smal...

Recordings of rat hippocampal place cells have provided information about how the hippocampus retrieves memory sequences. One line of evidence has to do with phase precession, a process organized by theta and gamma oscillations. This precession can be interpreted as the cued prediction of the sequence of upcoming positions. In support of this interpretation, experiments in two-dimensional envir...

The hippocampus is essential for spatial navigation, which may involve sequential learning. However, how the hippocampus encodes new sequences in familiar environments is unknown. To study the impact of novel spatial sequences on the activity of hippocampal neurons, we monitored hippocampal ensembles while rats learned to switch from two familiar trajectories to a new one in a familiar environm...

The rodent hippocampus and entorhinal cortex contain spatially modulated cells that serve as the basis for spatial coding. Both medial entorhinal grid cells and hippocampal place cells have been shown to encode spatial information across multiple spatial scales that increase along the dorsoventral axis of these structures. Place cells near the dorsal pole possess small, stable, and spatially se...

According to Historia Augusta (Vita Hadriani 20, 4), many cities in the Roman Empire were named Hadrianopolis after emperor Hadrian. The aim of this article is approximate number places Hadrian not only Hadrianopoleis mentioned. Cities emperors commemorate rulers’ role as founders or benefactors localities. This practice deserves special attention. extent which had been commemorated place names...