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Hoffman's sign is a neurological sign in the hand which is an indicator of problems in the spinal cord. It is associated with a loss of grip. The test for Hoffman's sign involves tapping the nail on the third or forth finger.What is a positive Hoffman sign?
If the index finger and thumb move, the person has a positive Hoffman’s sign. A doctor may notice the movement more profoundly if the person is extending or flexing their neck. A positive response is known as hyperreflexia. In the case of the Hoffman’s sign, this occurs when the nervous system overreacts to the flick on the fingernail.What is the Hoffman test?
The Hoffman sign refers to the results of the Hoffman test. This test is used to determine whether your fingers or thumbs flex involuntarily in response to certain triggers.