Mindfulness meditation alters alpha amplitude without affecting arousal

Area of Science:

• Neuroscience
• Psychology

Background:

• Mindfulness meditation's popularity is rising due to health benefits.
• The exact mechanisms behind these benefits remain unclear.

Purpose of the Study:

• To investigate if mindfulness of breathing meditation alters brain function and physiological responses.
• To explore changes related to attention and arousal mechanisms.

Main Methods:

• Electroencephalography (EEG) and skin conductance level (SCL) were recorded in 42 young adults.
• Participants underwent pre-training and post-training sessions six weeks apart.
• A mindfulness group was compared to an active-control music group.

Main Results:

• Alpha amplitude (8-13 Hz) decreased during meditation versus rest.
• Post-training, the mindfulness group showed less alpha reduction, suggesting a trait effect.
• Skin conductance level (SCL) decreased post-training in both groups, indicating reduced arousal, but no correlation with alpha amplitude was found.

Conclusions:

• Mindfulness meditation appears to reduce alpha band activity, reflecting enhanced attentional engagement.
• Findings support mindfulness meditation as a state of relaxed alertness.
• Alpha band activity is crucial for attentional control, potentially linking to improved emotional regulation and cognition.