Automatic sensory change processing in adults with attention deficit and hyperactivity disorder: a visual mismatch...

Area of Science:

• Neuroscience
• Psychiatry
• Cognitive Science

Background:

• Attention-Deficit/Hyperactivity Disorder (AD/HD) is linked to executive function deficits.
• Sensory processing abilities, particularly automatic change detection, may also be impaired in AD/HD.
• Mismatch negativity (MMN), an event-related potential, measures automatic sensory change processing.

Purpose of the Study:

• To investigate visual mismatch negativity (vMMN) characteristics in adults with AD/HD.
• To explore the relationship between vMMN, AD/HD symptoms, and executive functions.

Main Methods:

• Twenty-eight adults with AD/HD and 31 healthy controls participated.
• Participants underwent psychiatric evaluations, a visual ERP task for vMMN, and psychological assessments.
• Groups were matched for age, IQ, and sex.

Main Results:

• Adults with AD/HD exhibited significantly reduced late vMMN (230-330 ms) compared to controls.
• Late vMMN correlated with executive functions, but not directly with AD/HD symptoms.
• Mediation analyses revealed that executive functions mediated the link between late vMMN and AD/HD symptoms.

Conclusions:

• Impaired automatic sensory change processing, reflected by reduced late vMMN, is present in adults with AD/HD.
• This sensory processing deficit may negatively influence AD/HD symptoms by affecting executive functions.