Arousal and Execuive…

Overview of ADHD

Attention Deficit Hyperactivity Disorder (ADHD) is a prevalent neurobehavioral disorder in children, characterized by inattention, hyperactivity, and impulsivity, impacting academic and social development. Symptoms typically emerge before age 12 and can persist into adulthood, affecting both social relationships and emotional well-being.

Theoretical Models

The literature review focuses on two main models of ADHD:

  1. Inhibition Model: Proposed by Barkley, it posits that poor behavioral inhibition is central to ADHD, involving the incapacity to inhibit prepotent responses, stop ongoing actions, and resist interference, thus affecting executive functions.

  2. Cognitive-Energetic Model (CEM): Developed by Sergeant, this model asserts that ADHD symptoms stem from deficits in the energetic maintenance of cognitive functions related to arousal, effort, and activation.

Supporting Evidence

The review finds more substantial support for the CEM, indicating that unstable arousal may contribute to ADHD symptoms. Studies suggest dysregulation in the autonomic nervous system may correlate with attentional and executive function deficits. Evidence points to neurological abnormalities, particularly within the frontal cortex and basal ganglia, and neurotransmitter dysregulation, particularly affecting norepinephrine (NE) levels.

Implications

The findings suggest a critical need for considering arousal regulation in the diagnosis and treatment of ADHD, as it may serve as a biomarker for managing the disorder. Stimulus medications that stabilize arousal levels could improve outcomes for individuals with ADHD, emphasizing the relevance of the CEM in therapeutic approaches.



Attention Deficit Hyperactivity Disorder (ADHD) is a prevalent neurobehavioral disorder characterized by inattention, hyperactivity, and impulsivity, significantly impacting academic and social development throughout childhood and potentially into adulthood. Explaining ADHD, two primary theoretical constructs are considered: Barkley's Inhibition Model, which links symptoms to deficits in behavioral inhibition and executive function, and Sergeant's Cognitive-Energetic Model (CEM), positing that ADHD arises from impairments in the energetic maintenance of cognitive processes related to arousal, effort, and activation. Evidence leans towards the CEM, suggesting that unstable arousal, dysregulation within the autonomic nervous system, and neurological anomalies in areas like the frontal cortex and basal ganglia, alongside norepinephrine (NE) dysregulation, are key contributing factors. These insights emphasize the strategic importance of integrating arousal regulation into ADHD diagnosis and treatment, indicating that stimulant medications stabilizing arousal levels could optimize therapeutic outcomes.