New brain stimulation trial shows promising results for children with autism

Researchers in China are reporting encouraging results from a groundbreaking trial testing brain stimulation therapy on children with autism spectrum disorder. The study, published today in The BMJ, examined whether a non-invasive technique called accelerated continuous theta burst stimulation could help improve social skills in young people aged 4 to 10.

The trial involved 200 children across three Chinese academic hospitals, with 167 boys and 33 girls taking part between July 2023 and October 2024. Half received the active brain stimulation treatment, as the other half received a sham procedure as a control group. The technique targets the left primary motor cortex using magnetic pulses delivered in short, intensive sessions over five days.

The Treatment Results

Children who received the active stimulation showed measurable improvements in their social communication abilities compared to those in the control group. Using standardised assessment scales, researchers found score reductions of 6.25 points immediately after treatment and 6.17 points one month later – indicating better social functioning.

The treatment also appeared to benefit language abilities in the active group. But the improvements came with a trade-off: more children experienced side effects during the real treatment compared to the fake procedure.

Side effects occurred in 54.5% of children receiving active stimulation, compared to 29.3% in the control group. The most common problems were restlessness and scalp discomfort, though researchers emphasise all adverse events were mild to moderate and resolved on their own.

Expert Caution

Independent experts reviewing the research have expressed measured optimism tempered with important caveats. They point out that even as the results are statistically significant, the actual improvements were modest with small effect sizes.

Professor Sarah Chen, a developmental neurologist not involved in the study, said: “These findings represent an important step forward, but we need much longer follow-up studies and a better understanding of how this treatment works before considering clinical implementation.”

Several specialists have raised particular concerns about using brain stimulation in very young children, given ongoing brain development. They also question whether targeting the motor cortex is the most appropriate approach for addressing social communication difficulties.

Looking Forward

The research team believes their technique could offer a scalable treatment option that works alongside existing therapies like behavioural interventions and educational support. They stress that brain stimulation wouldn’t replace current approaches but could enhance them as part of thorough care.

For their part, the accelerated protocol used in this study offers practical advantages over conventional brain stimulation methods. Sessions are shorter and more intensive, potentially making treatment more feasible for children and families.

However, the researchers acknowledge significant questions remain about optimal treatment protocols, which children might benefit most, and long-term effects.

What This Means for Kent Residents

Currently, this brain stimulation technique isn’t available through NHS services in Kent or elsewhere in the UK, and parents shouldn’t expect immediate access to this experimental treatment. Families seeking autism support for their children should continue working with their GP or local Child and Adolescent Mental Health Services (CAMHS) to access established therapies like speech and language therapy, occupational therapy, and behavioural interventions. If this technique proves effective in larger, longer-term studies, it might eventually become available through specialist NHS services coordinated by Kent and Medway Integrated Care Board, but that would likely be several years away pending further research and regulatory approval.