There are five lumbar vertebrae located in the lower back. These vertebrae receive the most stress and are the weight-bearing portion of the back. The lumbar vertebrae allow movements such as flexion and extension, and some lateral flexion.
Update Date 6/29/2012
Updated by: Linda J. Vorvick, MD, Medical Director and Director of Didactic Curriculum, MEDEX Northwest Division of Physician Assistant Studies, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington; and C. Benjamin Ma, MD, Assistant Professor, Chief, Sports Medicine and Shoulder Service, UCSF Department of Orthopaedic Surgery. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M. Health Solutions, Ebix, Inc.