Science. 1982 Dec 17;218(4578):1235-7.

Asymmetrical brain activity discriminates between positive and negative affective stimuli in human infants.

Abstract

Ten-month-old infants viewed videotape segments of an actress spontaneously generating a happy or sad facial expression. Brain activity was recorded from the left and right frontal and parietal scalp regions. In two studies, infants showed greater activation of the left frontal than of the right frontal area in response to the happy segments. Parietal asymmetry failed to discriminate between the conditions. Differential lateralization of the hemispheres for affective processes seems to be established by 10 months of age.

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Asymmetrical brain activity discriminates between positive and negative affective stimuli in human infants.

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