articular pillar

articular pillar,

n columnar structure created by the flexible junction of the articular processes of the cervical vertebrae.
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Cervical spondylolysis is, however, much more rare than its lumbar counterpart and is described as a well-corticated cleft between the superior and inferior articular facets of the articular pillar of the cervical spine.
It has also been suggested that for increased comfort during a unilateral posteroanterior (P/A) pressure the paravertebral musculature should be pushed laterally so that the bulk of this muscle is not squashed against the underlying articular pillar (Edmondston & Elvey 1997).
In the cervical and lumbar regions this gutter is shallow, formed mainly by the laminae and articular pillars, whereas in the thoracic region the gutter is deeper and broader, being formed by the laminae, articular pillars and transverse processes.