The characteristic feature of thoracic vertebrae is the presence of joints that articulate with ribs. A mid-thoracic vertebra (shown here) has two joint facets on the vertebral body for the heads of adjacent ribs, and a third joint facet on the transverse process for the neck of a rib.
Also, what type of joint is the thoracic spine?
Subsequently, question is, what are the characteristics of the 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.
In this regard, how many joints are in your spine?
Each level of your spine functions as a three-joint complex. There are two facet joints in the back and a large disc in front.
How many vertebrae make up the thoracic spine?
How many bones are there in thoracic cage?
How many bones are in the thoracic cage?
The thoracic cage (rib cage) forms the thorax (chest) portion of the body. It consists of the 12 pairs of ribs with their costal cartilages and the sternum (Figure 1). The ribs are anchored posteriorly to the 12 thoracic vertebrae (T1–T12).
What is a synovial joint?
A synovial joint is the type of joint found between bones that move against each other, such as the joints of the limbs (e.g. shoulder, hip, elbow and knee). synovial membrane (or synovium) – a special layer of cells that lines the joint capsule and produces the synovial fluid.
What are the three parts of the sternum?
The sternum can be divided into three parts; the manubrium, body and xiphoid process.
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. By convention, the human thoracic vertebrae are numbered T1–T12, with the first one (T1) located closest to the skull and the others going down the spine toward the lumbar region.
What is the function of thoracic cage?
The ribs are attached posteriorly to the 12 thoracic vertebrae and most are anchored anteriorly either directly or indirectly to the sternum. The thoracic cage functions to protect the heart and lungs. The sternum consists of the manubrium, body, and xiphoid process.
Do ribs joint spine?
The costovertebral joints are the joints that connect the ribs to the vertebral column. The articulation of the head of the rib connects the head of the rib to the bodies of the thoracic vertebrae.
What parts of the body are controlled by the thoracic spine?
Thoracic Spinal Cord Injuries
- T-1 through T-5 nerves affect muscles, upper chest, mid-back and abdominal muscles. These nerves and muscles help control the rib cage, lungs, diaphragm and muscles that help you breathe.
- T-6 through T-12 nerves affect abdominal and back muscles.
What is the bottom of your back called?
The bottom of the spine is called the sacrum. It is made up of several vertebral bodies usually fused together as one. The remaining small bones or ossicles below the sacrum are also fused together and called the tailbone or coccyx.
What nerves are affected by c1 and c2?
C1, C2, and C3 (the first three cervical nerves) help control the head and neck, including movements forward, backward, and to the sides. The C2 dermatome handles sensation for the upper part of the head, and the C3 dermatome covers the side of the face and back of the head.
What bone protects your brain?
What nerves are affected by t12?
At T12, the ventral ramus becomes a subcostal nerve that travels beneath the twelfth rib. At T1 through T12, the dorsal ramus goes into the back muscles and also provides sensation to the skin. The motor and sensory functions provided by a thoracic nerve root are determined by its vertebral level.
What types of joints are in the spine?
The joints of the vertebral arches are the zygapophysial joints (often called facet joints). These articulations are plane synovial joints between the superior and the inferior articular processes (zygapophyses) of adjacent vertebrae.
What does a normal human spine look like?
The normal curvature of the spine looks like this: The spine in your neck (cervical spine) has a slight inward curve called a lordotic curve. The upper-to-mid back (thoracic spine) curves outward slightly in what's called a kyphotic curve. The lower back (lumbar spine) also has a slight inward lordotic curve.
What are the two bones below your neck?
Hyoid bone. The hyoid bone (lingual bone or tongue-bone) (/ˈha???d/) is a horseshoe-shaped bone situated in the anterior midline of the neck between the chin and the thyroid cartilage.
Where is the base of the spine located?
The sacrum forms the base of the spine and the back of the pelvis. Below the sacrum is a small bone called the coccyx (or tailbone), which is another specialized bone created by the fusion of several smaller bones during development.
What are the symptoms of thoracic spine nerve damage?
- 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.
How do you know if you have lumbar and thoracic?
A typical thoracic vertebra is distinguished by its long, downward projecting spinous process. Thoracic vertebrae also have articulation facets on the body and transverse processes for attachment of the ribs. Lumbar vertebrae support the greatest amount of body weight and thus have a large, thick body.
What features on thoracic vertebrae are lacking on other vertebrae?
Thoracic vertebrae lack transverse foramina. Spinous process. Thoracic spinous processes are long, straight, and narrow compared to the short, bifid cervical spinous processes and the hatchet-shaped lumbar spinous processes.