On supertaskers and the neural basis of efficient multitasking

Area of Science:

• Neuroscience
• Cognitive Psychology

Background:

• Multitasking is a complex cognitive function requiring significant mental effort.
• The prefrontal cortex is hypothesized to play a crucial role in managing attention and cognitive load during multitasking.

Purpose of the Study:

• To identify the neural underpinnings of individual differences in multitasking proficiency.
• To compare brain activity between individuals with exceptional multitasking skills (Supertaskers) and controls.

Main Methods:

• Functional neuroimaging (fMRI) was employed to measure brain activity.
• Participants, including Supertaskers and matched controls, performed a demanding dual N-back task.
• The dual N-back task assessed verbal and spatial working memory under high cognitive load.

Main Results:

• Supertaskers exhibited more efficient neural recruitment in the anterior cingulate and posterior frontopolar prefrontal cortices compared to controls.
• This enhanced activity in specific prefrontal regions correlated with superior multitasking performance.
• Cognitive load increased with task difficulty, highlighting the demands on attentional control.

Conclusions:

• Individual differences in multitasking ability are associated with distinct patterns of prefrontal cortex activation.
• Efficient functioning of the anterior cingulate and frontopolar cortex is critical for superior multitasking.
• Findings offer insights into the neural correlates of attentional control and cognitive load management.