Somatosensory Processing in Adults with ADHD
Author Information
Author(s): Colleen Dockstader, William Gaetz, Douglas Cheyne, Frank Wang, F Xavier Castellanos, Rosemary Tannock
Primary Institution: The Hospital for Sick Children, Toronto, Canada
Hypothesis
How does somatosensory processing differ between adults with ADHD and healthy controls?
Conclusion
Somatosensory processing is altered in individuals with ADHD, particularly in the duration of beta rebound.
Supporting Evidence
- Adults with ADHD showed significantly weaker event-related desynchrony and synchrony in the alpha and beta bands compared to controls.
- The duration of beta rebound was significantly shorter in the ADHD group.
- Neural responses diverged significantly during the early response to stimuli between ADHD and control groups.
- Both groups showed robust peak activity in secondary somatosensory cortices, but ADHD participants had less overall power.
Takeaway
People with ADHD have a harder time processing touch signals, especially when they can't predict when they'll happen.
Methodology
Event-related magnetoencephalography (MEG) was used to examine cortical rhythms in response to median nerve stimulation in adults with ADHD and healthy controls.
Potential Biases
Potential biases due to the small sample size and recruitment methods.
Limitations
The small and heterogeneous sample size limited the ability to investigate effects of gender, comorbidity, or treatment history.
Participant Demographics
9 adults with ADHD (4 females, 5 males) and 10 healthy controls (4 females, 6 males), all right-handed.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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