tabes dorsalis [L, tabes, wasting, dorsum, the back] , an abnormal condition caused by syphilis. It is characterized by the slow degeneration of all or part of the body and the progressive loss of deep tendon reflexes. This disease involves the posterior columns and posterior roots of the spinal cord and destroys the large joints of affected limbs in some individuals. A wide-base ataxic gait is usually present. It is often accompanied by incontinence and impotence and severe flashing pains in the abdomen and extremities. See also tabetic gait.
