Symptoms of sciatica originating at this level of the lower back may include: pain and/or numbness at the top of the foot, particularly in the web between the great toe (big toe) and the second toe. 1  See All about the L4-L5 Spinal Segment. 2  Sciatica from S1 nerve root.
The Advisory Board Company. The Advisory Board Company is a best practices firm that uses a combination of research, technology, and consulting to improve the performance of health care organizations and educational institutions. 1 History.
In 1989 the American Board of Preventive Medicine was approved to offer a subspecialty certificate in Undersea Medicine (the name was changed to Undersea and Hyperbaric Medicine in 1999), in 1992 a subspecialty certificate in Medical Toxicology, and in 2010 a subspecialty certificate in Clinical Informatics.