postzygapophyseal

Postzygapophyseal refers to the posterior, articulating surfaces of the articular processes of a vertebra. These structures are also known as the inferior articular facets. They are located on the back side of the superior articular facets. The postzygapophyseal facets are covered with articular cartilage and are designed to fit together with the prezygapophyseal facets of the vertebra below. This interlocking mechanism plays a crucial role in stabilizing the vertebral column and limiting excessive movement, particularly in rotation and extension. The orientation and shape of these facets can vary between different regions of the spine and between different species, influencing the range and type of motion possible at each vertebral joint. In humans, the zygapophyseal joints, formed by the prezygapophyseal and postzygapophyseal facets, are synovial joints. Their integrity is essential for maintaining spinal alignment and function. Damage or degeneration of these structures can lead to pain and limited mobility.