TMS and cognitive function: what does the research actually show?

Depression doesn't just affect mood — it affects thinking. Research shows 80-90% of depressed patients have measurable cognitive impairment on formal testing, and for about 40% of people, that fog persists even after medication lifts their mood. TMS appears to help with both. A 2024 study in Brain Stimulation tested 65 TMS patients before and after treatment and found a 45% improvement on sustained attention tasks after 6 weeks — and notably, some of that improvement was independent of mood improvement, meaning it showed up even in patients with only modest mood responses. Working memory also improved, with effects that appeared dose-dependent. Executive function — planning, decision-making, cognitive flexibility — showed the strongest gains, with studies reporting 25-40% improvement in test scores. The likely mechanism: the left DLPFC, the standard TMS target for depression, is the brain's executive hub. Stimulating it appears to improve its connectivity with other regions, while also reducing interference from overactive emotional circuits that otherwise divert cognitive resources toward processing distress. This distinguishes TMS from some antidepressant medications, where sedation or emotional blunting can actually work against clear thinking. If cognitive symptoms — trouble concentrating, forgetting things, feeling mentally slow — are a significant part of your depression, this is a real factor to bring up with a specialist. https://tmslist.com/blog/tms-and-cognitive-function/ Did you notice changes in concentration or memory during your course, separate from your mood? At what week did clearer thinking show up, if it did? This is general information, not medical advice.