What is the posterior projection of the vertebra?
Lamina of a lumbar vertebra – Superior view. The spinous process (Processus spinosus) is a posterior projection from the junction of the two laminae. Its thick, broad, quadrilateral shape serves as an attachment point for ligaments and muscles that stabilize the back. [
What is the posterior part of the vertebrae called?
The vertebral arch forms the posterior portion of each vertebra. It consists of four parts, the right and left pedicles and the right and left laminae. Each pedicle forms one of the lateral sides of the vertebral arch. The pedicles are anchored to the posterior side of the vertebral body.
What part of the vertebrae extends posteriorly?
vertebral arch
The vertebral arch forms the posterior portion of each vertebra. It consists of four parts, the right and left pedicles and the right and left laminae. Each pedicle forms one of the lateral sides of the vertebral arch. The pedicles are anchored to the posterior side of the vertebral body.
What is sacral vertebra?
The sacral vertebrae—also called the sacral spine—consists of five sacral vertebrae bones. These bones fuse together to form the sacrum, the shield-shaped bony structure located at the base of the lumbar vertebrae (the five cylindrical bones forming the spine of the lower bank) and connected to the pelvis.
What is the C2 vertebra called?
The C1 and C2 vertebrae are the first two vertebrae of the cervical spine. They are also called the atlas and axis vertebrae.
Which vertebrae has costal facets?
thoracic vertebrae
The primary characteristic of the thoracic vertebrae is the presence of costal facets. There are six facets per thoracic vertebrae: two on the transverse processes and four demifacets—the facets of the transverse processes articulate with the tubercle of the associated rib.
What is Sacrococcygeal curve?
The thoracic and sacrococcygeal curves are primary curves retained from the original fetal curvature. The cervical and lumbar curves develop after birth and thus are secondary curves. The cervical curve develops as the infant begins to hold up the head, and the lumbar curve appears with standing and walking.
What is vertebral arch?
Vertebral arch: A circle of bone around the canal through which the spinal cord passes. A vertebral arch is composed of a floor at the back of the vertebra, walls (the pedicles), and a roof where two laminae join.
Where is the costal facet?
A costal facet is a site of connection between a rib and a vertebra. The costal facets are located on the vertebrae that the rib articulates with. They are the superior costal facet, the inferior costal facet, and the transverse costal facet.
What do the costal facets of thoracic vertebrae articulate with?
Thoracic vertebrae in humans
Thoracic vertebrae have bodies of intermediate size. They are distinguished by their long, slender spines and by the presence of facets on the sides of the bodies articulating with the heads of the ribs and by facets on the transverse processes articulating with the tubercles of ribs.
Which ribs have costal facets?
Costal facets only apply to ribs 2–9. Ribs 1, 10, 11, and 12 articulate completely onto the thoracic vertebrae rather than in between two of them.
What is transverse costal facet?
The transverse costal facet (or transverse costal fovea) is one of the costal facets, a site where a rib forms a joint with the transverse process of a thoracic vertebra.
What is costal tubercle?
The costal tubercle is a dorsal eminence between the neck and the body of a rib. The costal tubercle bears an articular facet for articulation with the transverse process of the vertebra.
Are costal facets and Demifacets the same thing?
A facet is a flat or nearly flat surface on a bone. A demifacet is actually half of a facet and is where part of the head of the rib or part of the costal cartilage articulates and these are usually found on ribs 2 through 9. … For example, rib 5 articulates with thoracic vertebra 4 at is inferior demifacet.
What is an articular facet?
A facet is a flat or nearly flat surface on a bone. The vertebral articular facets are where two vertebrae articulate. There will be one pair of facets on the superior side of the vertebrae and one pair on the inferior side of the vertebrae.
Where are costal facets found quizlet?
*Costal facets are found on the lumbar vertebrae.
What is Atlas vertebra?
atlas: the first cervical vertebra (C1), lying directly under the skull, through which the head articulates with the neck. The main connection to the vertebra below is a pivot around the odontoid process that is an upward projection of the body of the second cervical vertebra.
What is a vertebral facet?
Small joints located between and behind adjacent vertebrae. There are two facet joints at each level of the vertebral column, providing stability to the spinal column while allowing movement. … Facet joints are encased with facet joint capsules, which contain fluid that protects and lubricates the joints.
What is superior articular facet?
Superior articular facet (facies articularis superior) is a posterior facing, slightly concave surface on the superior articular process. It articulates with the inferior articular facet on the vertebra above.
What are the four curvatures of the vertebral column?
There are four natural curves in the spinal column. The cervical, thoracic, lumbar, and sacral curvature.
What type of synovial joint are facet joints?
The facet joints, (or zygapophysial joints, zygapophyseal, apophyseal, or Z-joints) are a set of synovial, plane joints between the articular processes of two adjacent vertebrae. There are two facet joints in each spinal motion segment and each facet joint is innervated by the recurrent meningeal nerves.
What is pars Interarticularis?
The pars interarticularis (pars) lies between the superior and inferior articular process bilaterally at each vertebral level. Anatomically, one can describe the pars as the region between two, one superior and one inferior, zygapophyseal joints.
What is the facet joint made up of?
Broadly, the facet joint is made up of a variety of hard and soft tissues: the bony articular pillars of the lateral mass provide the opposing surfaces that are covered by cartilage, the synovium which is a connective tissue lining that maintains lubrication for the articular surfaces and enables their frictionless …