There is an intense connection between:
• The uncovertebral joint.
• The vertebral artery.
• The nerve root.
The artery lies between the uncinate process and the nerve root.
The nerve root lies behind the artery and just anterior to the facet joint.
Degenerative changes leading to osseous, cartilaginous or capsular hypertrophy may result in compression of artery or nerve root.
The uncovertebral joint is the main threat to the vertebral artery.
The facet joint is the main threat to the nerve root.
Movements such as rotation, combined with either extension or flexion, also influence these structures.
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