- - Paresthesias and/or numbness in the lower extremities or in all four limbs; Weakness of the limbs, with predominance in the lower extremities; Unsteady, stiff or uncoordinated gait; Sensation of electrical shock through the back or the legs upon flexion of the neck (L'Hermitte's sign); Stiffness or spasm in the lower extremities; Urinary frequency, urgency, incontinence or retention; Fecal incontinence or retention; Sexual dysfunction with erectile impairment in men;