What is the difference between cervical and thoracic vertebrae?
The thoracic vertebrae are larger than the cervical bones and have longer spinous processes. … These structures make the thoracic spine more stable than the cervical or lumbar regions. In addition, the rib cage and ligament system limit the thoracic spine’s range of motion and protects many vital organs.
What are some anatomical differences between the cervical thoracic and lumbar vertebrae?
Thus, cervical vertebrae are smaller than lumbar vertebrae due to differences in the proportion of body weight that each supports. Thoracic vertebrae have sites for rib attachment, and the vertebrae that give rise to the sacrum and coccyx have fused together into single bones.
What are the differences between the vertebrae?
The main difference between thoracic and lumbar vertebrae is that the body of the thoracic vertebrae is comparatively large whereas the body of the lumbar vertebrae is the largest body. … Thoracic and lumbar vertebrae are the two types of vertebrae groups found in the middle and the lower part of the spine.
How can you tell the difference between lumbar and thoracic vertebrae?
How are cervical vertebrae different?
The cervical spine is much more mobile than the thoracic or lumbar regions of the spine. Unlike the other parts of the spine, the cervical spine has transverse foramina in each vertebra for the vertebral arteries that supply blood to the brain.
Why are thoracic vertebrae different?
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.
What is the function of cervical vertebrae?
The cervical spine functions to provide mobility and stability to the head while connecting it to the relatively immobile thoracic spine. The movement of nodding the head takes place predominantly through flexion and extension at the joint between the atlas and the occipital bone, the atlanto-occipital joint.
How do you identify cervical vertebrae?
In humans, cervical vertebrae are the smallest of the true vertebrae and can be readily distinguished from those of the thoracic or lumbar regions by the presence of a foramen (hole) in each transverse process, through which the vertebral artery, vertebral veins, and inferior cervical ganglion pass.
What structure do cervical vertebrae have the thoracic and lumbar do not?
Typical cervical vertebrae have several features distinct from those typical of thoracic or lumbar vertebrae. The most notable distinction is the presence of one foramen, in each transverse process. These transverse foramina encircle the vertebral arteries and veins.
What is a thoracic vertebrae?
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 are cervical vertebrae?
The cervical spine (neck region) consists of seven bones (C1-C7 vertebrae), which are separated from one another by intervertebral discs. These discs allow the spine to move freely and act as shock absorbers during activity.
What is the thoracic vertebrae function?
Thoracic (mid back) – the main function of the thoracic spine is to hold the rib cage and protect the heart and lungs. The twelve thoracic vertebrae are numbered T1 to T12.
Why are two of the cervical vertebrae different than the others?
Cervical vertebrae are smaller than vertebrae in other regions. They are cylindrically shaped and are wider in the transverse than in the anteroposterior (AP) diameters. The size gradually increases from C3-7. The pedicles are short and project dorsolaterally.
How are the thoracic vertebrae 11 and 12 difference?
The eleventh thoracic vertebra (T-11) has an intact, superiorly placed costal facet on each side of the vertebral body, but no costal articulation on the transverse processes. The twelfth thoracic vertebra (T-12) resembles T-11, but the inferior articular facets assume the lumbar pattern.
How many cervical vertebrae are there?
The spine above the sacrum consists of: Seven bones in the neck—the cervical spine. 12 bones in the chest—the thoracic spine. Five bones in the lower back—the lumbar spine.
How do the first two cervical vertebrae differ from other cervical vertebrae what are their functions?
The atlas (C1 vertebra) differs from the other cervical vertebrae in that it does not have a body, but instead consists of bony ring formed by the anterior and posterior arches. The atlas articulates with the dens from the axis.
Why are the cervical vertebrae the smallest and most delicate?
The cervical vertebrae are the smallest and most delicate simply because they do not need to be larger and thicker.
Can you have 8 cervical vertebrae?
There are 31 pairs of spinal nerves (8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal). Because there are only seven cervical vertebrae, the first seven cervical nerves exit above the same numbered cervical vertebrae.
How do the cervical vertebrae differ from the other vertebrae quizlet?
The seven cervical vertebrae form the neck region of the spine. The first two vertebrae (atlas and axis) are different because they perform functions not shared by the other cervical vertebrae. The atlas has no body.
Do cervical vertebrae have spinous processes?
The spinous process of a typical cervical vertebra is short and bifid posteriorly. It is bifid because it develops from two separate secondary centers of ossification. This morphology is unique to cervical spinous processes.
Why do cervical vertebrae have transverse foramen?
Transverse foramina are only present in the cervical vertebrae. These foramina allow the passage of the vertebral artery and vein. The vertebral arteries arise from the first part of the subclavian artery.