An electrical-stimulation lead includes a body having a distal portion, a proximal portion, and a perimeter electrodes disposed along the distal portion of the body and including segmented electrodes that each extend around no more than 50% of the perimeter of the body terminals disposed along the proximal portion of the body and conductors electrically-coupling the terminals to the electrodes and at least one anchoring unit disposed along the distal portion of the body and configured and arranged for resisting rotation of the body and electrodes relative to patient tissue upon implantation of the lead. Each anchoring unit includes a lead-attachment element and at least one anchoring element attached to the lead-attachment element. The anchoring element extends away from the lead-attachment element and is configured and arranged for physically contacting patient tissue and resisting rotation of the body in proximity to the anchoring element.
