10 NERVOUS SYSTEM - Dr. Victor Arai

Thoracic vertebrae are in the upper back and have an extra facet for rib attachment. Thick lumbar vertebrae are in the lower back. Five sacral vertebrae fuse to form a sacrum. The coccyx, or tailbone, is at the base of the vertebral column. ... painful spasms. A strain is an overstretching of a muscle; a sprain is a twisting of a joint leading ... ................
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