Combining Stimulation Protocols to Probe Memory Consolidation-Commentary on Hausdorf et al. 2025.

A recent study by Hausdorf et al. reported that combining closed-loop acoustic stimulation with transcranial direct current stimulation during sleep does not improve memory consolidation. This contrasts with past studies that reported a beneficial effect of each method individually. In this commentary, I discuss the relevance of the study in the current literature and offer potential explanations for this absence of effect.