The sign I wish to describe is one which I have employed for the past two years. Although the cases observed number only four, I feel justified in attaching great importance to the sign because it is dependent on a normal function, which I find always exhibited in healthy persons and invariably present in the sound leg of patients suffering from hemiplegia or paresis of one leg due to some pathologic lesion.
If a normal person, lying on a couch in the dorsal position, be asked to lift the right foot off the couch with the leg extended, the left heel will be observed to dig into the couch as the right leg and thigh are elevated. If you place your hand under the tendo Achillis of the left side and sense the muscular resistance offered by the left leg you will observe that the left heel is pressed on
HOOVER CF. A NEW SIGN FOR THE DETECTION OF MALINGERING AND FUNCTIONAL PARESIS OF THE LOWER EXTREMITIES.. JAMA. 1908;LI(9):746-747. doi:10.1001/jama.1908.25410090028001h