James J. Knierim

The paper introduces a lightweight, screwless Neuropixels fixture for chronic recordings in freely moving rodents, enabling stable multi-probe implants and high extraction success.

The paper shows that theta frequency reflects internal path-integration gain errors during navigation, providing a method to estimate hidden cognitive variables through physiological oscillations.

The paper investigates how area 29e in the rodent parahippocampus processes visual landmarks and interacts with spatial circuits during navigation, finding that 29e maintains landmark coupling while other regions decouple.

The paper investigates how head direction and CA1 place cells recalibrate path-integration gain during navigation, showing synchronized recalibration during movement but distinct dynamics during head-scanning.

This study uses place field repetition in rats to show that positional and nonpositional inputs to hippocampal CA1 are functionally dissociated, with positional inputs linked to spatial location and nonpositional inputs linked to temporal dynamics.

This study investigates how the lateral entorhinal cortex (LEC) integrates spatial and temporal information in rats during foraging tasks, finding that LEC neurons exhibit rate remapping that reflects temporal context.

The paper demonstrates that optic flow can recalibrate path integration in hippocampal place cells using a closed-loop virtual reality system.

This paper introduces a modified ring attractor network that enables gain recalibration in continuous bump attractor networks through explicit error coding and Hebbian plasticity.

The paper shows that place cells and landmark vector cells in the hippocampus of rats encode spatial information using a shared directional signal related to head direction.

The paper investigates remapping in granule and mossy cells of the mouse dentate gyrus during foraging in different environments, finding both cell types remap robustly but through distinct mechanisms.

This study examines how aging affects functional heterogeneity along the CA3 transverse axis in rats, showing reduced pattern separation in aged memory-impaired rats.

The paper investigates how DG cells encode spatial and object information in mice, finding cells that respond to object changes and spatial reorganization.

This paper introduces a single-camera, marker-based system for high-accuracy 6-degree-of-freedom head tracking of rodents, achieving accuracy comparable to multi-camera systems.

This study examines age-related changes in neural firing rates along the CA3 transverse axis in rats, finding a reversed gradient in hyperactivity compared to young rats.

This study shows that hippocampal place cells encode surface texture boundaries, leading to enhanced decorrelation of neural representations across boundaries and potentially causing distance overestimation.

This study shows that the path integration gain in hippocampal place cells is a plastic variable that can be recalibrated by persistent conflict between self-motion cues and external landmarks.