Where the fourth thoracic vertebra (t4) sits in the skeleton
The fourth thoracic vertebra (T4) is the 4th of the twelve thoracic vertebrae. It articulates with the ribs on each side to support the back of the rib cage, and the spinal cord runs through it. The sternal angle, where the manubrium meets the body of the sternum in front, usually lies level with the gap between the fourth and fifth thoracic vertebrae. The arch of the aorta begins and ends at this level.
Frequently asked questions
Which part of the skeleton is the fourth thoracic vertebra (T4) in?
The fourth thoracic vertebra (T4) is one of the bones of the vertebral column. Seven cervical, twelve thoracic and five lumbar vertebrae and the sacrum are stacked to support the trunk and enclose the spinal cord.
How many vertebrae are there?
The spine has 24 separate vertebrae. From the top there are seven cervical (neck), twelve thoracic (upper back) and five lumbar (lower back) vertebrae, followed by the sacrum and the coccyx.
Which bones are above and below the fourth thoracic vertebra (T4)?
Above the fourth thoracic vertebra (T4) is the third thoracic vertebra (T3), and below it is the fifth thoracic vertebra (T5).
At what level of the spine is the sternal angle?
Usually at the gap between the fourth and fifth thoracic vertebrae. The second costal cartilage joins the sternum beside it, so it is the starting point for counting ribs from the front.
Other bones of the vertebral column
- Atlas (C1)
- Axis (C2)
- Third cervical vertebra (C3)
- Fourth cervical vertebra (C4)
- Fifth cervical vertebra (C5)
- Sixth cervical vertebra (C6)
- Seventh cervical vertebra (C7)
- First thoracic vertebra (T1)
- Second thoracic vertebra (T2)
- Third thoracic vertebra (T3)
- Fifth thoracic vertebra (T5)
- Sixth thoracic vertebra (T6)
- Seventh thoracic vertebra (T7)
- Eighth thoracic vertebra (T8)
- Ninth thoracic vertebra (T9)
- Tenth thoracic vertebra (T10)
- Eleventh thoracic vertebra (T11)
- Twelfth thoracic vertebra (T12)
- First lumbar vertebra (L1)
- Second lumbar vertebra (L2)
- Third lumbar vertebra (L3)
- Fourth lumbar vertebra (L4)
- Fifth lumbar vertebra (L5)
- Sacrum
Joints of the fourth thoracic vertebra (T4)
Compare with similar bones
Bone counts
By region
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