The T1 vertebra is the first (uppermost) of the twelve (12) thoracic vertebrae that make up the central and largest section of the spinal column between the lumbar vertebrae below and the cervical vertebrae above.
While larger than the C7 vertebra above it, the T1 is the smallest of the thoracic vertebrae.
Which vertebral body has the largest size?
Although vertebrae range in size; cervical the smallest, lumbar the largest, vertebral bodies are the weight bearing structures of the spinal column. Upper body weight is distributed through the spine to the sacrum and pelvis.
What are the 12 thoracic vertebrae?
In human, thoracic vertebrae consists of 12 bones. From top to down, T1, T2, …, T12. A typical thoracic vertebra, seen from lateral side. In vertebrates, thoracic vertebrae compose the middle segment of the vertebral column, between the cervical vertebrae and the lumbar vertebrae.
How big is a thoracic vertebrae?
Vertebrae: Thoracic Spine Has 12 Vertebrae. The cervical spine is your neck, and it has 7 vertebrae. The thoracic spine is located in the chest area and contains 12 vertebrae. The ribs connect to the thoracic spine and protect many vital organs.
Which thoracic vertebrae are atypical?
T1 and T9 – T12 are considered atypical thoracic vertebrae. T1 bears some resemblance to low cervical vertebrae. T9 has no inferior demifacet. T10 often, but not always, shares features with T11 and T12.
Why do vertebral bodies increase in size?
The body is the anterior portion of each vertebra and is the part that supports the body weight. Because of this, the vertebral bodies progressively increase in size and thickness going down the vertebral column. The bodies of adjacent vertebrae are separated and strongly united by an intervertebral disc.
What is unique about thoracic vertebrae?
The thoracic vertebrae are a group of twelve small bones that form the vertebral spine in the upper trunk. Thoracic vertebrae are unique among the bones of the spine in that they are the only vertebrae that support ribs and have overlapping spinous processes.
What is the job of the 12 thoracic vertebrae?
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. The range of motion in the thoracic spine is limited. Lumbar (low back) – the main function of the lumbar spine is to bear the weight of the body.
What are the symptoms of thoracic spine nerve damage?
The symptoms of a herniated disc in the thoracic area usually include:
- Pain that travels around the body and into one or both legs.
- Numbness or tingling in areas of one or both legs.
- Muscle weakness in certain muscles of one or both legs.
- Increased reflexes in one or both legs that can cause spasticity in the legs.
What is the difference between cervical and thoracic vertebrae?
The cervical vertebrae occur in the neck region while the thoracic vertebrae occur in the thoracic region of the body. The main function of both cervical and thoracic vertebrae is to protect the spinal cord. The main difference between cervical and thoracic vertebrae is their location and role.
Is thoracic back pain serious?
Common Causes of Thoracic Spine Pain. Upper back pain is typically due to one of the following: Muscular problems. The cause may be poor posture (such as forward head posture) or any type of irritation of the large back and shoulder muscles, including muscle strain or spasms.
What are the typical thoracic vertebrae?
Given the twelve thoracic vertebrae are largely similar, most are considered typical thoracic vertebrae with the exceptions T1 and T9 to T12.
What joint is the thoracic vertebrae?
The costotransverse joint connects the tubercle of the rib (costal tubercle) with the transverse process of the thoracic vertebra.
What is the difference between typical and atypical vertebrae?
The key difference between typical and atypical vertebrae is that typical vertebrae consist of all basic components of a vertebra while atypical vertebrae are the vertebrae that have modified structure due to their position and function.
Why does the vertebral column curve?
It serves as a pillar to support the body’s weight and to protect the spinal cord. There are three natural curves in the spine that give it an “S” shape when viewed from the side. These curves help the spine withstand great amounts of stress by providing a more even distribution of body weight.
How many curvatures are in the vertebral column?
How many vertebrae have large vertebral bodies?
The lower four thoracic vertebrae contain more lumbar features, like large bodies, robust transverse and spinous processes, and lateral projecting articular facets. The middle four thoracic vertebrae have characteristics between these two regions.
What are the characteristics of thoracic vertebrae?
Distinguishing features of the thoracic vertebrae include the presence of facets on the sides of the bodies for articulation with the heads of the ribs, and facets on the transverse processes of all, except the 11th and 12th vertebrae, for articulation with the tubercles of the ribs.
What is cervical thoracic lumbar?
Cervical Spine. The neck region of the spine is known as the Cervical Spine. This region consists of seven vertebrae, which are abbreviated C1 through C7 (top to bottom). These vertebrae protect the brain stem and the spinal cord, support the skull, and allow for a wide range of head movement.
Which group of spinal vertebrae is closest to the chest?
The numbers 1 to 7 indicate the level of the vertebrae. C1 is closest to the skull, while C7 is closest to the chest.
What are the seven warning signs of cancer?
If you have any of these signs, see your doctor. These are potential cancer symptoms.
- Change in bowel or bladder habits.
- A sore that does not heal.
- Unusual bleeding or discharge.
- Thickening or lump in the breast or elsewhere.
- Indigestion or difficulty in swallowing.
- Obvious change in a wart or mole.
Why does my upper back hurt between my shoulder blades?
A strain causes pain in the upper back between your shoulder blade and your spine. A spasm feels like a knot or tightness in the muscle. You may have pain when you move your shoulders or when you breathe. You will need to change or stop doing the activities that cause pain until your muscles have healed.
Is middle back pain a sign of cancer?
If it involves the spine, it can mimic many of the symptoms of an upper back injury. Lung cancer related back pain may be generalized like a muscle ache or sharp like a pinched nerve. Red flags that back pain may be due to lung cancer include: Back pain that is present at rest.
What are the two atypical vertebrae?
Atypical cervical vertebrae. Of the cervical vertebrae, the atlas (C1), axis (C2) and vertebra prominens (C7) are considered atypical cervical vertebrae. The atlas (C1) lacks a body or spinous process. It has an anterior and posterior arches with lateral masses.
Photo in the article by “Wikimedia Commons”