Where are the joints of Luschka located?

• A. Cervical spine segments C1-C2
• B. Cervical spine segments C3-C7
• C. Thoracic spine segments T1-T2
• D. Lumbar spine segments L1-L2

Answer: (B)

The joints of Luschka, also known as uncovertebral joints, are found in the cervical spine segments C3 to C7. These joints form between the uncinate processes of the cervical vertebrae and the lateral aspects of the vertebral bodies above them. Their primary function is to provide stability to the cervical spine while allowing for motion and flexibility, particularly the lateral flexion movement. This anatomical feature plays a critical role in preventing excessive lateral translation or angulation of the cervical vertebrae during various activities.

In contrast, the other choices highlight regions of the spine where the joints of Luschka do not exist. The segments C1-C2 are known for their unique atlantoaxial joint, which provides rotational movement, while the thoracic spine (T1-T2) does not have uncovertebral joints, as these are more closely associated with the cervical region. The lumbar spine (L1-L2) primarily features different joints, such as the facet joints and intervertebral discs, reflecting its different structural and functional dynamics. Thus, understanding the specific location and function of the joints of Luschka is crucial for comprehending cervical spine mechanics.