The brain's functional network architecture reveals human motives

Area of Science:

• Neuroscience
• Cognitive Science
• Social Psychology

Background:

• Goal-directed behaviors are motivated by internal drives.
• Motives are unobservable mental constructs.
• Understanding the neural basis of altruism requires differentiating underlying motives.

Purpose of the Study:

• To investigate if brain functional network architecture can predict different motives behind altruistic acts.
• To differentiate neural signatures of empathy-based versus reciprocity-based altruism.
• To compare the functional brain architecture of altruists and selfish individuals.

Main Methods:

• Functional network analysis of brain activity.
• Distinguishing connectivity patterns associated with different altruistic motives.
• Examining responses to empathy and reciprocity inductions in different individuals.

Main Results:

• Brain functional network architecture accurately predicts motives behind altruism; mere activity does not.
• Empathy-based altruism shows ACC to AI connectivity.
• Reciprocity-based altruism involves AI to ACC and AI to ventral striatum connectivity.
• Selfish individuals exhibit distinct functional architectures and respond selectively to empathy, not reciprocity, inductions.

Conclusions:

• Brain connectivity patterns, not regional activity, encode information about altruistic motives.
• Distinct neural network architectures underlie different forms of altruism.
• Individual differences in functional brain architecture correlate with altruistic tendencies and responses to motivational cues.