Hoover signs

Hoo·ver signs

(hū'vĕr sīnz)
1. A subject lying supine, when asked to raise one leg, involuntarily creates counterpressure with the heel of the other leg; if this leg is paralyzed, whatever muscular power is preserved in it will be exerted in this way; or if the patient attempts to lift a paralyzed leg, counterpressure will be made with the other heel, whether any movement occurs in the paralyzed limb or not; not present in hysteria or malingering.
2. A modification in the movement of the costal margins during respiration, caused by a flattening of the diaphragm; suggestive of empyema or other intrathoracic condition causing a change in the contour of the diaphragm.

Hoover,

Charles F., U.S. physician, 1865-1927.
Hoover signs - in organic hemiplegia the patient attempts to lift a paralyzed leg, counterpressure will be made with the other heel, whether any movement occurs in the paralyzed limb or not.