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Related Experiment Video

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Brain Imaging Investigation of the Impairing Effect of Emotion on Cognition

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Disrupting SMA activity modulates explicit and implicit emotional responses: an rTMS study.

Alessia Rodigari¹, Massimiliano Oliveri¹

¹Department of Psychological, Pedagogical and Education Sciences, University of Palermo, Fondazione Santa Lucia IRCCS, Roma, Italy.

Neuroscience Letters

|July 20, 2014

Summary

Non-invasive brain stimulation of the Supplementary Motor Area (SMA) can alter emotional responses. Repetitive transcranial magnetic stimulation (rTMS) over the SMA modulated the perceived valence of emotional stimuli, demonstrating neuromodulation of affect.

Keywords:

Emotion Motor system Repetitive transcranial magnetic stimulation (rTMS)Supplementary Motor Area (SMA)

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Area of Science:

Neuroscience
Cognitive Psychology
Brain Stimulation

Background:

The Supplementary Motor Area (SMA) is theorized to link emotional/motivational systems with motor control.
Understanding the SMA's role in emotional processing is crucial for developing targeted interventions.

Purpose of the Study:

To investigate if non-invasive brain stimulation of the SMA can modulate emotional responses.
To determine the specificity of the SMA's neuromodulatory effects on emotional valence and arousal.

Main Methods:

Healthy subjects received 1Hz repetitive transcranial magnetic stimulation (rTMS) over the SMA.
Participants performed a task involving judging the valence and arousal of emotional and neutral visual stimuli.
Control stimulation was applied over the visual cortex.

Main Results:

rTMS over the SMA significantly altered the perceived valence of emotional stimuli.
Negative stimuli were perceived as more positive, and positive stimuli as less positive.
This modulatory effect was specific to emotional content and the SMA site, as neutral stimuli and visual cortex stimulation showed no such effects.

Conclusions:

Non-invasive brain stimulation of the SMA can effectively modulate emotional valence perception.
These findings represent the first demonstration of neuromodulating emotional responses via non-invasive brain stimulation targeting the SMA.
The SMA plays a key role in the processing and modulation of emotional experiences.