Dictionary of Human Evolution and Biology

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Left-occipital-right-frontal Petalia Pattern

Combination of left-occipital and right-frontal cortical asymmetry. Pongid brains are often asymmetrical in the anteroposterior plane, but those of modern humans are asymmetrical in both the anteroposterior and lateral planes. This latter pattern of brain asymmetry is thought to be related to hand dominance.

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