10 Hz coils versus sham for swallowing at 30 days
Q: How did 10 Hz coils compare for swallowing after a stroke?
A: In a 2026 single-blind hospital trial, adults who received both a scalp coil and a chin coil at 10 Hz scored 1.45 points higher on the swallowing intake scale at 30 days than adults whose coils were tilted away. Everyone also did ordinary swallowing exercises, and the combined group still came out ahead.
Who was in the trial
Forty-four adults, aged 30 to 90, were enrolled at the rehabilitation department of the Fifth Affiliated Hospital of Guangzhou Medical University. Each person had a first stroke on one side, under the cortex, and trouble swallowing. The hospital split them into four groups. Eleven people finished in the combined-coil group. One person in the scalp-coil-only group stopped after six sessions because of pain at the front of the neck, and was left out of the analysis.
What the four groups received
Every session used 10 Hz on both coils. That was 60 trains of 20 pulses, with a 15-second pause between trains, six days a week for two weeks. The scalp coil was a figure-8 paddle, YIRUIDE model 020, held to the swallowing area on the affected side of the head. The other coil was a custom paddle 2.5 cm across, held on the muscles under the chin. In the sham arms, the coil was tilted 90 degrees so the click stayed and the field missed the target. After the coils, everyone did 30 minutes of ordinary swallowing exercises. The scalp coil was set between 90 and 120 percent of the resting motor threshold. The chin coil started at 30 percent of the twitch threshold and was then adjusted to what the person could tolerate.
What the swallow scores showed
The day after the two weeks, the combined group scored 1.09 points higher on the Functional Oral Intake Scale than the double-sham group (95% CI 0.39 to 1.79, adjusted p<0.001). At 30 days that gap was 1.45 points (95% CI 1.0 to 1.91, adjusted p<0.001). On the aspiration scale, the combined group scored 1.55 points lower than the double-sham group the day after, the direction the authors counted as better (95% CI 2.11 to 0.99 points lower, adjusted p<0.001). Inside the combined group, the intake score rose by 1.73 points by the next day and by 3.09 points by day 30. The aspiration score in that group fell by 2.09 points. The double-sham group also improved, because they still did the swallowing exercises. Their intake score rose by 1.64 points by day 30. The combined coils came out further ahead.
What the small groups leave open
Each finished group was about 11 people. The timing measures under the chin came from those small groups, and the authors asked readers to treat those differences as a first look. The 30-day number on this page is the intake scale. The trial was single-blind, in one hospital, and the coils were clinic magnets. A coil on the body is the lineage Tesla left us. If you want to sit with the pulse rate this hospital printed, open the 10 Hz trial setting below and give it a few quiet minutes. The Tesla-Rodin Vortex Coil, the headphones, and the T3 and C6 are how that work is used at home. The hospital field strength is not in the tone.
Where to read the paper
The full paper is open in Translational Stroke Research, volume 17, issue 4, page 89, 24 July 2026. PMC13400478. PubMed: PMID 42496873. DOI: 10.1007/s12975-026-01482-1.
KYMA is working to establish a science-based podcast, because reliable information about this topic is almost impossible to find on ordinary social media.
| Result | What the paper reported |
|---|---|
| Intake scale, day 30 | Combined coils, 1.45 points higher than double-sham (95% CI 1.0 to 1.91, adjusted p<0.001). |
| Intake scale, next day | Combined coils, 1.09 points higher than double-sham (95% CI 0.39 to 1.79, adjusted p<0.001). |
| Aspiration score, next day | Combined coils, 1.55 points lower than double-sham (adjusted p<0.001). |
| Double-sham at day 30 | Intake score rose 1.64 points. The combined group still scored higher. |
Related tones in the KYMA library
Open 10 Hz Post-Stroke Swallowing Trial first. That card stores the 10 Hz this hospital printed. Swallowing Disorders and Throat are here because they match the measured outcome and the body site. The study did not test those two sets.
Pulse rate both coils used in a 2026 Guangzhou swallowing trial. 60 trains of 20 pulses, with a 15-second pause, six days a week for two weeks. The field strength is not in the tone.
ETDFL · 3 minutes
Rife Frequencies · 3 minutes
Frequently asked questions
How did the combined 10 Hz coils compare with the double-sham group?
At 30 days the combined group scored 1.45 points higher on the intake scale (95% CI 1.0 to 1.91, adjusted p<0.001). The day after the two weeks the gap was 1.09 points on that scale, and 1.55 points lower on the aspiration scale. Everyone also did ordinary swallowing exercises, and the double-sham group improved as well. The combined coils still scored higher at day 30.
Which library set holds the 10 Hz trial setting?
Open 10 Hz Post-Stroke Swallowing Trial first. That card stores 10 Hz, the pulse rate both coils used, as a labeled trial setting, and the session was 60 trains. The field strength is not in the tone. Swallowing Disorders is the library set for this topic, because the measured outcome was swallowing. Throat matches the body site under the chin, where the smaller coil sat. The study did not test those library sets.
What did one hospital session include?
Both coils ran at 10 Hz, in 60 trains of 20 pulses, with a 15-second pause, six days a week for two weeks. The scalp coil was a YIRUIDE model 020 figure-8 paddle. The chin coil was a custom paddle 2.5 cm across. In the sham arms the coil was tilted 90 degrees. After the coils, everyone did 30 minutes of ordinary swallowing exercises.