Brain and Language Associations in Autism Spectrum Disorder: A Scoping Review.

Gandhi et al. (2022) mapped 17 brain imaging studies that looked at language in autism. They pulled every paper that used MRI, EEG, or PET to see how autistic brains handle speech, words, or reading.

The team asked one question: do the studies point to the same brain signature for language problems? They recorded age, test type, and imaging method for each paper.

No single brain pattern showed up across the studies. Different labs used different ages, language tests, and scanners, so results scattered like confetti.

The review concludes we still lack a clear neural "marker" for language issues in autism.

Camodeca et al. (2020) narrows the mess down. Their narrative review finds one stable theme: atypical lateralisation. Autistic people often show right-side or mixed-side activity when hearing or speaking. Gandhi et al. (2022) includes this paper, so the scoping review actually contains a seed of order inside the chaos.

Wagner et al. (2025) pushes the timeline earlier. They show that high-likelihood infants already fail to left-lateralise when listening to native speech at 9 months. This extends A et al.'s picture by showing the lateralisation issue starts before kids can talk.

Megnin et al. (2012) adds a concrete cue tip: autistic teens do not get the usual neural boost from watching a speaker's mouth. This ERP study is another brick inside A et al.'s scoping wall, showing why visual speech cues alone may not help.

For now, do not wait for a brain scan to tell you if language intervention is needed. Use good behavioural assessments and watch how each client reacts to auditory, visual, and reading cues. If a child ignores your mouth movements, add explicit auditory prompts. Mix your modalities until you see progress, because the brain evidence says one size will never fit all.