Brain processes during laughter
A recent study reveals that laughter is processed through two different brain systems. One is an involuntary laughter network associated with emotions and pleasure, while the other is a voluntary laughter system linked to movements and speech. Stimulation of the first network induces deep laughter accompanied by feelings of happiness, whereas stimulation of the second results in brief laughter that is related to social communication and talking, making it essential in human interactions. The evolutionary differences between these systems show that the older network is responsible for emotional expressions and automatic sounds, while the more recent network enables purposeful communication and motor control. These findings offer a deeper understanding of the nature of laughter and its social and psychological significance, suggesting that disorders in the voluntary system could affect speech, while the capacity for laughter and emotional expression remains intact.
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