The abstract is read at the publisher; the summary is JClub's.
In neurosurgical patients performing associative recognition, scopolamine during encoding disrupts hippocampal slow theta (2–4 Hz) and selectively impairs recollection-based memory.
- Why it matters: Cholinergic dysfunction is central to Alzheimer’s and related disorders, but how cholinergic signaling shapes memory-related brain rhythms is unclear.
- What they did: Patients with intracranial electrodes received scopolamine either at encoding or during retrieval-only, while slow theta power, theta phase reset, and encoding–retrieval pattern reinstatement were measured.
- The result: Scopolamine at encoding caused dose-dependent reductions in theta power and phase reset plus impaired recollection, whereas scopolamine during retrieval disrupted slow theta without memory deficits, supporting theta as an encoding-related state.
The findingWhy it mattersWhat they didThe result
AI summary of the abstract · may contain errors · not medical advice · read the paper.