What is the Difference Between Typical and Atypical Vertebrae?
🆚 Go to Comparative Table 🆚The difference between typical and atypical vertebrae lies in their structure and function. Vertebrae are the bones that make up the vertebral column, which protects the spinal cord. They are classified into two categories: typical and atypical vertebrae.
Typical Vertebrae have a standard vertebral anatomy, which includes a vertebral body and a vertebral arch made up of laminae and pedicles. These vertebrae are found in most adults and primarily consist of thoracic, lumbar, and certain cervical vertebrae.
Atypical Vertebrae are modified structures that deviate from the standard vertebral anatomy due to their position and function. These vertebrae are found in specific regions of the vertebral column and include:
- C1, C2, and C7 of the cervical vertebrae
- T1, T9, T10, T11, and T12 of the thoracic vertebrae
- L5 of the lumbar vertebrae
Some examples of atypical vertebrae are:
- C1 (Atlas): This vertebra lacks a vertebral body and has two bilateral masses that articulate with the occipital condyles of the skull.
- C2 (Axis): This vertebra contains a vertical projection called the dens, which articulates with the atlas.
- C7: This vertebra has a non-bifid, longer spinous process compared to other cervical vertebrae.
- L5 (Lumbar): This vertebra has the largest vertebral body and transverse processes, and it has the most inferiorly located discovertebral unit in the human vertebral column.
In summary, typical vertebrae follow the standard vertebral anatomy and are found in most adults, while atypical vertebrae have modified structures due to their specific functions and positions within the vertebral column.
Comparative Table: Typical vs Atypical Vertebrae
The vertebral column includes two types of vertebrae: typical and atypical vertebrae. Here is a table summarizing the differences between them:
Vertebra Type | Region | Description |
---|---|---|
Typical Vertebrae | Cervical | C3, C4, C5, C6 |
Atypical Vertebrae | Cervical | C1, C2, C7 |
Typical Vertebrae | Thoracic | T2, T3, T4, T5, T6, T7, T8 |
Atypical Vertebrae | Thoracic | T1, T9, T10, T11, T12 |
Typical Vertebrae | Lumbar | All except L5 |
Atypical Vertebrae | Lumbar | L5 |
Typical Vertebrae | Sacrum | All |
Atypical Vertebrae | Sacrum | None |
Typical Vertebrae | Coccyx | All |
Atypical Vertebrae | Coccyx | None |
Typical vertebrae follow the standard vertebral anatomy and include a vertebral arch, while atypical vertebrae are modified structures due to their function and position. Atypical vertebrae are found in the cervical, thoracic, and lumbar regions, with the sacrum and coccyx consisting of typical vertebrae.
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