Cannabidiol and fronto-parietal EEG connectivity in autistic children.

Autistic children often show altered brain network connectivity, including circuitry implicated in social cognition. Cannabidiol (CBD) has emerged as a potential therapy for autism, but its neural mechanisms remain under-researched. Here, we analyze resting-state data collected as part of a double-blind, placebo-controlled crossover trial, to explore whether 12 weeks of oral CBD oil could modulate functional connectivity in autistic children. Twenty-nine autistic children (5 to 12 years) completed two 12-week intervention periods (CBD and placebo, randomized) separated by an 8-week washout. Before and after each period, 5 min of eyes-open resting-state electroencephalography (EEG) were obtained from a subset of 18 participants (8 female). Functional connectivity was calculated across 16 electrode-pairs in the delta, theta, alpha, beta, and gamma bands. Beta-band connectivity between the right frontal and right inferior-parietal electrodes increased following CBD (P = 0.001, false discovery rate [FDR]-corrected P [pFDR] = 0.022), and alpha connectivity showed an increase that did not remain following FDR correction (P = 0.036, pFDR = 0.428). No significant differences were observed following placebo for any frequency band (pFDR > 0.69). This study provides preliminary evidence that 12 weeks of cannabidiol is associated with an increase in right fronto-parietal (F4-P8) functional connectivity in autistic children, most pronounced in the beta-band. Replication in larger samples is needed to confirm generalizability and clinical relevance.

This study explored whether cannabidiol (CBD) oil changes brain communication in autistic children. After 12 weeks, children showed stronger activity links between brain regions involved in attention and social understanding, while placebo did not show this pattern. These early findings suggest CBD may influence brain function in ways that could support behavior, but larger studies are needed to confirm real-world benefits.