![]() The purpose of the canal is to create a bony casing from the head to the lower back, through which the spinal cord passes. ![]() The spinal canal is formed by the placement of single vertebral foramina one on top of the other to form a canal. The spinous process forms a steeple at the apex of the laminae and is the part of our spine that is felt directly under the skin. The transverse processes spread out from the side of the pedicles like wings and help to anchor the surrounding muscle to the vertebral arch. The laminae of the vertebra can be described as a pair of flat-arched bones that form a component of the vertebral arch. Two strong pedicle bones join the vertebral arch to the body of the vertebrae. The body is cylindrical in shape, strong and stable. Parts of a VertebraĪ single vertebra is made up of two parts, the front portion is called the body and the back portion is referred to as the vertebral or neural arch. The vertebrae and disks form the spinal column from the neck to the pelvis, giving symmetry and support to the body. It is made up of bony segments called vertebrae with fibrous tissue called intervertebral disks between them. The spine, also called the backbone, plays a vital role in stability, smooth movement and protection of the delicate spinal cord. A distinguishing characteristic of the lumbar vertebrae is the presence of mammillary processes which are a rounded elevations located on the superior articular processes.Cervical Spine Anatomy Anatomy of the Spine They contain thick bodies, long transverse processes, and thick, short spinous processes. Lumbar Vertebrae: the 5 lumbar vertebrae are considerably larger than any of the aforementioned vertebrae. This most noticeable characteristic is the presence of facets for articulation with the ribs on both the body and transverse process. The spinous processes tend to be oriented inferiorly in the lower thoracic vertebrae. ![]() These vertebrae contain well-developed transverse and spinous processes. Thoracic Vertebrae: 12 thoracic vertebrae exist, increasing in size inferiorly. This articulation prevents anterior slippage of C2 under C1. Dens of C2: a bony projection that extends superiorly to articulate with the anterior arch of C1. This vertebra does not have a body, only an anterior arch. They contain a small circular opening in each transverse process, the transverse foramen. These vertebrae are small and somewhat flattened, increasing in size as you move inferiorly. Cervical Vertebrae: 7 cervical vertebrae located int he neck. Intervertebral Foramen: passageway formed by the joining of articular processes of the vertebrae above and below one another allow the peripheral or spine nerves to exit the spinal cord. Vertebral Foramen: passageway formed by the vertebral arch and the body encloses the spinal cord. Superior and Inferior Articular Process: bilateral superior and inferior projections which articulate with the vertebra above and below. Spinous Process: non-paired posterior projection of the vertebral arch you can feel the spinous process by running your thumb down the midline of your back. Transverse Process: extend laterally from each pedicle. ![]() Arch has several components: Pedicle: extend bilaterally from the body to the transverse process. Arch: arched structure posterior to the body. Body: largest, thickest weight bearing portion, located anteriorly in the spine. General structure of a vertebra contains 2 components: body and the arch.
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