Methods research is cool🤩. This work suggests that hexadirectional modulation in fMRI is not a specific signature of grid-cell activity and may arise from alternative mechanisms (variance, nonlinearities, analysis). We need more validation of existing methods, especially for non-invasive recordings.
Alina Studenova
Can grid cells produce hexadirectional signals? https://www.biorxiv.org/content/10.64898/2026.03.04.709667v1
