Froment's sign


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Froment's sign

the flexing of the terminal phalanx of the thumb against the flexed index finger. See thumb sign.
References in periodicals archive ?
There was loss of sensation on the bilateral hand and feet along with hypoaesthesia over his forearm, arm and thighs, with atrophy of the small muscles of the hand with positive Froment's sign.
Inclusion criteria required a diagnosis of CubTS according to guidelines provided by the American Association of Neuromuscular and Electrodiagnostic Medicine:[sup][4] (1) symptoms of impairment of ulnar nerve, such as paresthesia of the digitus annularis and digitus minimus, hand clumsiness, atrophy of hypothenar muscles, weakness of the muscles dominated by the ulnar nerve, pain, or numbness in ulnar nerve dominated area, positive Froment's sign, positive Wartenberg's sign, and so on; (2) routine motor NCS results suggested CubTS; (3) informed consent signed; and (4) age between 18 and 85 years old.
Although Froment's sign was negative, he had generalized weakness affecting the middle finger and thumb compared with the right hand.