{"source":"Muscles: Testing and Function (4th Edition)","author":"Florence Kendall, Elizabeth McCreary, Patricia Provance","year":1993,"quote":"The mechanics of the low back is inseparable from that of the overall posture but especially that of the pelvis and the lower extremities. Pain manifested in the leg may be due to an underlying problem in the back. Conversely, the symptoms appearing in the low back may be due to underlying faulty mechanics of the feet, legs, or pelvis."}