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Science 23 July 1993:
Vol. 261. no. 5120, pp. 475 - 477
DOI: 10.1126/science.8332914

Articles

Science, Vol 261, Issue 5120, 475-477
Copyright © 1993 by American Association for the Advancement of Science


articles

Right hemisphere dominance for the production of facial expression in monkeys

MD Hauser

Department of Biological Anthropology, Harvard University, Cambridge, MA 02138.

In humans, the left side of the face (right hemisphere of the brain) is dominant in emotional expression. In rhesus monkeys, the left side of the face begins to display facial expression earlier than the right side and is more expressive. Humans perceive rhesus chimeras created by pairing the left half of the face with its mirror-reversed duplicate as more expressive than chimeras created by right-right pairings. That the right hemisphere determines facial expression, and the left hemisphere processes species-typical vocal signals, suggests that human and nonhuman primates exhibit the same pattern of brain asymmetry for communication.


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Representations of faces and body parts in macaque temporal cortex: A functional MRI study.
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Emotion Processing in Chimeric Faces: Hemispheric Asymmetries in Expression and Recognition of Emotions.
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A Neural Network Model of Lateralization during Letter Identification.
N. Shevtsova and J. A. Reggia (1999)
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