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An involuntary bending of the fingers in response to tactile stimulation of the palm, producing an uncontrollable grasp and associated in adults with injury of the frontal lobe of the brain.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.