Low back conditions that are nonradicular in nature (i.e., not due to nerve root irritation or nerve root compression), present differently especially in regards to referral into the lower extremity. Any innervated tissue in the low back can refer pain into the lower extremity. These nonradicular pain patterns typically present as conditions in which the pain in the low back is more aggravating and more of a concern to the patient than the discomfort in the lower extremity. The lower extremity discomfort with nonradicular syndromes is not as clearly demarcated and the quality of pain is not as disconcerting as true radicular pain. This is in contrast to the individual with nerve root (radicular) pain in which the lower extremity pain is often the more problematic complaint than the pain in the low back. Therefore, an important goal of the examination (history and physical) is for the physical therapist to discern whether the LBP and leg pain that the patient presents with is radicular pain (i.e., true nerve root problem) or nonradicular pain (i.e., pain felt in the back and referred to the lower extremity due to injury to any low back structure such as apophyseal or sacroiliac joints, muscle, ligament, fascia, etc.)