الفهرس 
Anatomy of Motion Segment
Role of muscles of the spine in mechanics of motion segment:Only 14 pages are availabe for public view
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Abstract
Spinal fusion is the standard method of surgical treatment for
deformity, trauma, and degenerative disorders over the past 50 years.
Adjacent segment disease (ASD) is one of the most important issues
after fusion surgery. Abnormal loading and increased mobility in
adjacent segments may explain the development of ASD, but it is still
unclear whether it is caused by fusion sequelae or is the result of natural
degeneration.
Adjacent segment disease (ASDis) was defined as a condition in
which a patient showed the relief of symptoms for at least 6 months
after the index operation; the newly developed symptoms were
compatible with the lesions in adjacent segments demonstrated in
radiological images, while adjacent segment degeneration (ASDeg) was
defined as radiographic changes in the intervertebral discs adjacent to
the surgically treated levels.
This study retrospectively evaluated the results of 50 spinal
fusions performed at Orthopedic Surgery department, Tanta University
with at least one year follow up period after surgery.
Inclusion criteria included patient age from 30 to.