Neural shifts in alpha rhythm's dual functioning during empathy maturation

Area of Science:

• Neuroscience
• Developmental Psychology
• Cognitive Science

Background:

• Empathy relies on cortical alpha rhythm suppression in adults, but younger individuals show reversed alpha enhancement patterns.
• A unique developmental window around age 20 allows studying both low-alpha suppression and high-alpha enhancement in empathy.

Purpose of the Study:

• To investigate the functional role of low-alpha power suppression and high-alpha power enhancement during empathy development.
• To identify the neurodevelopmental transition in empathic brain responses.

Main Methods:

• Multimodal neuroimaging combining magnetoencephalography (MEG) and functional magnetic resonance imaging (fMRI).
• Recorded neural activity and hemodynamic responses in 40 healthy individuals perceiving vicarious pain.
• Targeted subjects around age 20 to capture a critical developmental transition.

Main Results:

• MEG revealed an all-or-none alpha pattern shift during empathy around age 18: enhancement before, suppression after.
• MEG and fMRI showed a correspondence between high-alpha increase/BOLD decrease (pre-18) and low-alpha decrease/BOLD increase (post-18).
• This transition was not detected by self-report measures or a control neuroimaging task.

Conclusions:

• Empathy maturation involves an all-or-none transition around age 18 from alpha enhancement/inhibition to alpha suppression/activation.
• This shift may indicate a marker of maturation in empathic ability.
• The study provides insight into the functional maturation of empathy during adolescence and early adulthood.