When the fibrous outer ring of an intervertebral disk is torn then that condition is known as disk herniation. During this condition, the central part of the disk comes out. This condition is usually seen in elderly people as in old age the annulus fibrosus starts degenerating. Sometimes when the disk which is already present has developed a bulge on the surface can lead to spinal disk herniation. Treatment of lumbar intervertebral disk herniation by side posture manipulation is safe and effective.
The impact factor of journal provides quantitative assessment tool for grading, evaluating, sorting and comparing journals of similar kind. It reflects the average number of citations to recent articles published in science and social science journals in a particular year or period, and is frequently used as a proxy for the relative importance of a journal within its field. It is first devised by Eugene Garfield, the founder of the Institute for Scientific Information. The impact factor of a journal is evaluated by dividing the number of current year citations to the source items published in that journal during the previous two years.
Last date updated on July, 2014