Holger Dannenberg

Tiling of large-scaled environments by grid cells requires experience

This study shows that grid cells in mice require multi-day experience to adapt their firing patterns to large-scale environments, suggesting that their spatial scaling is limited by the scale ratio of successive grid modules.

Cholinergic dynamics in the septo-hippocampal system provide phasic multiplexed signals for spatial novelty and correlate with behavioral states

This study investigates sub-second cholinergic dynamics in the septo-hippocampal system during a spatial memory task, revealing multiplexed signals related to movement speed, spatial novelty, and behavioral states.

Spatial periodicity in grid cell firing is explained by a neural sequence code of 2-D trajectories

The paper mathematically proves that spatial periodicity in grid cell firing is the only solution to a neural sequence code for 2-D trajectories, explaining the hexagonal firing pattern and its functional role.

A Continuous Attractor Model with Realistic Neural and Synaptic Properties Quantitatively Reproduces Grid Cell Physiology

The paper uses a spiking continuous attractor network model with biophysically realistic parameters to reproduce grid cell firing patterns and spatial properties observed in rodents.

Temporal dynamics of cholinergic activity in the septo-hippocampal system

This study shows cholinergic modulation in the septo-hippocampal system changes rapidly with running speed and is logarithmically correlated to movement speed, independent of visual cues.

Effects of visual inputs on neural dynamics for coding of location and running speed in medial entorhinal cortex.

This study shows that visual inputs influence the spatial stability of grid cell firing in the medial entorhinal cortex, correlating with theta frequency changes, while not affecting speed modulation of firing rates.