What is the function of Prezygapophysis?
These stick out of an end of a vertebra to lock with a zygapophysis on the next vertebra, to make the backbone more stable. The superior processes or prezygapophysis project upward from a lower vertebra, and their articular surfaces are directed more or less backward (oblique coronal plane).
What is Prezygapophysis and Postzygapophysis?
noun In anatomy and zoology, an inferior or posterior zygapophysis; in man, an inferior oblique or articular process of a vertebra: opposed to prezygapophysis.
What is Zygapophyses in biology?
Medical Definition of zygapophysis : any of the articular processes of the neural arch of a vertebra of which there are usually two anterior and two posterior.
What does articular process mean?
Medical Definition of articular process : either of two processes on each side of a vertebra that articulate with adjoining vertebrae: a : superior articular process. b : inferior articular process.
What is a vertebral body?
The vertebral body is the main portion of the vertebra. It bears about 80 percent of the load while standing and provides an attachment for the discs between the vertebrae. The front or anterior section of the vertebral body protects the spinal cord and nerve roots.
What is thoracic vertebra?
Thoracic vertebrae are the twelve vertebral segments (T1-T12) that make up the thoracic spine. These structures have very little motion because they are firmly attached to the ribs and sternum (breastbone).
What is the vertebral notch?
A concavity on the inferior surface of the vertebral arch for transmission of a spinal nerve.
What is a articular?
articular. / (ɑːˈtɪkjʊlə) / adjective. of or relating to joints or to the structural components in a joint.
What is the vertebral?
Vertebrae are the 33 individual, interlocking bones that form the spinal column. Each vertebra has three main functional components: the vertebral body for load-bearing, the vertebral arch to protect the spinal cord, and transverse processes for ligament attachment.
What is the vertebral canal?
The vertebral canal, otherwise known as the vertebral cavity or spinal cavity, is an anatomical space formed by the vertebral column that stores an integral portion of the central nervous system: the spinal cord and the spinal nerve roots branching off the spinal cord bilaterally.
What is a thoracic?
The thoracic spine is the longest region of the spine, and by some measures it is also the most complex. Connecting with the cervical spine above and the lumbar spine below, the thoracic spine runs from the base of the neck down to the abdomen. It is the only spinal region attached to the rib cage.
Which is part of the vertebra preserves prezygapophysis?
Material: Three dorsal vertebra fragments (MG 8809) including a transverse process and a partial neural arch preserving the prezygapophysis. One of those fragments corresponds to the left prezygapophysis and parapophysis of a middle or a posterior dorsal vertebra.
When was the term prezygapophysis first used?
Also: either of two anterior articular processes on the haemal arch of certain fishes. Mid 19th century; earliest use found in Richard Owen (1804–1892), comparative anatomist and palaeontologist.
Where are the zygapophysial joints on the vertebae?
One of the bilateral small flat projections on the surfaces of the arches of the vertebae, at the point where the pedicles and laminae join, forming the zygapophysial joint surfaces. Synonym (s): processus articularis [TA] , zygapophysis.