The hands that hold the keys.
Collins
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D002540:Cerebral Cortex / Q000098:blood supply / Q000502:physiology*; D003638:Deafness; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D012813:Sign Language; D013060:Speech / Q000502:physiology*; D013687:Telencephalon / Q000098:blood supply / Q000502:physiology