The vertebral arch (or neural arch) is the posterior part of a vertebra.
It consists of a pair of pedicles and a pair of laminae, and supports seven processes:
four articular processes
two transverse processes
one spinous process
This definition incorporates text from the wikipedia website - Wikipedia: The free encyclopedia. (2004, July 22). FL: Wikimedia Foundation, Inc. Retrieved August 10, 2004, from http://www.wikipedia.org