Transcranial direct current stimulation of the medial prefrontal cortex modulates the propensity to help in costly helping behavior. Liao, C., Wu, S., Luo, Y., Guan, Q., & Cui, F. Neuroscience Letters, 674:54–59, May, 2018.
Transcranial direct current stimulation of the medial prefrontal cortex modulates the propensity to help in costly helping behavior [link]Paper  doi  bibtex   

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