Gestural movement and speech production are temporally and neurally integrated, supported by neuroimaging evidence showing shared fronto-temporal networks and real-time interaction during communication.
The retrieved papers provide robust neuroimaging (fMRI, MEG, ERP) and behavioral evidence demonstrating that co-speech gestures and speech production share overlapping neural substrates (such as Broca's area and superior temporal regions) and interact temporally during planning and comprehension. Therefore, the claim is well-supported by multiple high-quality empirical studies.