ArticleBMC neuroscience2025
Effects of different transcranial magnetic stimulation coil types on phosphene thresholds and their association with motor cortex excitability.
Article in BMC neuroscience, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundPhosphenes can be induced by applying transcranial magnetic stimulation (TMS) to the visual cortex. Since multiple factors influence phosphene perception, this study aimed to examine the effects of different TMS coil types on phosphene thresholds (PTs). Additionally, the relationship between PT and motor cortex excitability was explored.
methodsIn Session 1, TMS was applied to the left visual cortex of 22 healthy individuals using a round coil and a figure-eight coil, and PT was recorded. Resting motor threshold (RMT), active motor threshold (AMT), and short-interval intracortical inhibition (SICI) were assessed by stimulating the left motor cortex. After 5–7 days, the visual cortex was stimulated again in Session 2 with the same healthy individuals.
resultsIn Session 1, the mean PTs obtained with the round and figure-eight coils were 39.71 ± 9.67% (n = 17) and 53.93 ± 14.26% (n = 15), respectively (p = 0.001). In Session 2, the mean PTs were 37.83 ± 11.34% and 51.53 ± 14.03% (p = 0.001) for the round and figure-eight coils, respectively. The intraclass correlation coefficients for PTs across studies were 0.832 for the round coil and 0.591 for the figure-eight coil. No significant correlation was found between PT and AMT, RMT, or SICI.
conclusionPTs were lower with the round coil than with the figure-eight coil. The reliability of PTs can be considered good for round coil and moderate for figure-eight coil. Additionally, the findings suggested that motor cortex and visual cortex excitability are different entities.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.