Mother’s Behavioral Corrections Tune Infant’s Brain to Angry Tone

 

The same brain network that adults use when they hear angry vocalizations is at work in infants as young as six months old, an effect that is strongest in infants whose mothers spend the most time controlling their behavior, according to a new study in the open-access journal PLOS ONE by Chen Zhao of the University of Manchester, UK, and colleagues. The study indicates that the network recruited in adult vocal emotion processing is up and running quite early in life, and that its sensitivity to anger is partly a result of maternal interactions.

 

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Lack of sleep intensifies anger, impairs adaptation to frustrating circumstances

Losing just a couple hours of sleep at night makes you angrier, especially in frustrating situations, according to new Iowa State University research. While the results may seem intuitive, the study is one of the first to provide evidence that sleep loss causes anger. The research also provides new insight on our ability to adjust to irritating conditions when tired.

Other studies have shown a link between sleep and anger, but questions remained about whether sleep loss was to blame or if anger was responsible for disrupted sleep, said Zlatan Krizan, professor of psychology at Iowa State. The research, published in the Journal of Experimental Psychology: General, answers those questions and provides new insight on our ability to adjust to irritating conditions when tired.

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