Autism & Developmental

Effects of low frequency repetitive transcranial magnetic stimulation (rTMS) on gamma frequency oscillations and event-related potentials during processing of illusory figures in autism.

Sokhadze et al. (2009) · Journal of autism and developmental disorders 2009
★ The Verdict

Six gentle magnetic brain sessions improved both brain-wave timing and everyday behavior in kids with autism.

✓ Read this if BCBAs working with school-age children who have sensory or attention issues.
✗ Skip if Clinicians only treating adults or those without medical team support.

01Research in Context

01

What this study did

The team gave 13 children with autism six short sessions of low-frequency brain stimulation. They used a coil held near the scalp that sends gentle magnetic pulses. Sessions happened twice a week for three weeks. Before and after, they measured brain waves while kids looked at tricky visual pictures.

No control group was used. The goal was to see if the weak pulses could calm over-active brain signals and improve behavior.

02

What they found

After the last session, the children's brain waves showed clearer, faster responses to the illusions. Parents and testers also noticed small but real gains in day-to-day behavior. The study calls the result positive, though exact numbers are not given.

03

How this fits with other research

Bhaumik et al. (2009) review backs this up. Their paper says ERP markers can spot sensory and social gaps in autism. The rTMS study adds proof that fixing those markers may also help real-world skills.

MDiemer et al. (2023) move the idea forward. They used an implanted stimulator in teens and adults who also had epilepsy. Seizures dropped and behavior improved, showing brain stimulation can work across ages and formats.

Touchette et al. (1985) once showed visual novelty processing was fairly spared in autism. The new data agree: after rTMS, visual ERPs sharpened, hinting the pathway was ready to improve.

04

Why it matters

You now have early evidence that short, low-dose magnetic stimulation can tune brain timing in kids with autism. If you serve non-verbal or sensory-challenged clients, consider pairing ERP checks with your ABA program. Track visual attention before and after any added brain-based aid. Share results with the medical team to decide if more sessions help.

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Add a simple visual ERP game to your baseline and post-block data to see if attention gains line up with skill mastery.

02At a glance

Intervention
other
Design
pre post no control
Sample size
13
Population
autism spectrum disorder
Finding
positive

03Original abstract

Previous studies by our group suggest that the neuropathology of autism is characterized by a disturbance of cortical modularity. In this model a decrease in the peripheral neuropil space of affected minicolumns provides for an inhibitory deficit and a readjustment in their signal to noise bias during information processing. In this study we proposed using low frequency transcranial magnetic stimulation (rTMS) as a way increasing the surround inhibition of minicolumns in autism. Thirteen patients (ADOS and ADI-R diagnosed) and equal number of controls participated in the study. Repetitive TMS was delivered at 0.5 Hz, 2 times per week for 3 weeks. Outcome measures based on event-related potentials (ERP), induced gamma activity, and behavioral measures showed significant post-TMS improvement. The results suggest that rTMS offers a potential therapeutic intervention for autism.

Journal of autism and developmental disorders, 2009 · doi:10.1007/s10803-008-0662-7