| | Alternative Medicine | Urine Therapy Is the external urethral sphincter under voluntary control? No, the external urethral sphincter is not under voluntary control. It is controlled involuntarily by the spinal cord. Urine Therapy - Related Articles What Food Ingredients Are Cats Most Allergic To? How to Strengthen My Corneas Naturally Exercise, Nutrition & Immune Function Types of Implantable Defibrillators What is parrillada? How do you get rid of the egg burps? The Effects of Washing Organic Layer With Sodium Carbonate