Irritability in pediatric mania and other childhood psychopathology

Area of Science:

• Child Psychology
• Neuroscience
• Psychopathology

Background:

• Irritability is a significant symptom in childhood psychopathology, yet it lacks systematic assessment methods and clear diagnostic associations.
• Recent debates on childhood mania highlight the need for better understanding and measurement of irritability.
• Differentiating normative from pathological irritability is possible but its validity remains uncertain.

Purpose of the Study:

• To propose a definition of irritability from an affective neuroscience perspective to guide future research.
• To review potential methods for systematically assessing irritability in children, particularly those with mood and anxiety disorders.
• To explore the utility of reactive aggression as an animal model for studying irritability.

Main Methods:

• Review of neural circuitry underlying reactive aggression as a potential animal model for irritability.
• Discussion of behavioral paradigms for assessing frustration, response inhibition, attention, reversal learning, facial emotion recognition, and emotional regulation.
• Brief review of the pharmacology of irritability.

Main Results:

• Normative and pathological irritability can be reliably differentiated, though the validity of this distinction requires further investigation.
• Several behavioral paradigms are identified as potentially useful for studying irritability in children.
• Reactive aggression may serve as a relevant animal model for understanding irritability.

Conclusions:

• A clear definition and systematic assessment methods are crucial for advancing research on childhood irritability.
• Affective neuroscience offers a promising framework for defining and studying irritability.
• Further research using proposed behavioral paradigms and considering neurobiological underpinnings is warranted.