9 Birth Defects and Their Symptoms and Treatments. Here's a primer on nine of the most common birth defects: their prevalence, causes, symptoms, and treatment. By Richard B. Johnston Jr., MD from American Baby.
Itâs a good book for the average woman whoâs looking to build a better physique, especially if youâre looking for. glute improvement. Strong Curves: A Womanâs Guide to Building a Better Butt and Body is well worth the $23 for the actual book and a steal at $10 on the Kindle.
The spine's curves work like a coiled spring to absorb shock, maintain balance, and to facilitate the full range of motion throughout the spinal column (see Anatomy of the Spine). The spine has three natural curves, a concave cervical and lumbar curve, and a gentle convex thoracic curve. These curves are maintained by two muscle groups, flexors and extensors. The flexor muscles are in the front and include the abdominal muscles.