What Is a Spinal Block?

Congenital block vertebra ------------ klipple-feil syndrome: short neck deformity, also known as congenital bony torticollis.

Block vertebra

Congenital block vertebrae ------------ klipple-feil syndrome:

It is caused by the segmental disorder of the protovertebral body of the leaf during the embryonic period, which affects two or more segments. Fusion can be complete, or limited to the vertebral body and vertebral arch. It is common in the lumbar spine, followed by the cervical spine and rare in the thoracic spine. Although multiple vertebral bodies are fused with each other, their total height does not change.

Blocked vertebrae are congenital bone fusions of the spine, often involving two or more vertebral bodies. The two vertebral bodies in the affected area often show complete bone fusion. Except for the vertebral body, the pedicles also fuse with each other. The anterior and posterior diameters of the affected vertebrae are shortened and the front is depressed, and the anterior edge of the fusion vertebra is usually smooth and curved. The spinal canal is short and the spinous processes are fully or partially fused. Mostly combined spinal canal and accessories and foraminal deformities.

1. The anterior edge of the fusion vertebra is smooth and has a curved depression.

2. The sagittal diameter of the vertebral body is shorter than that of the normal vertebral body.

3. The fusion of the vertebral body is narrow, showing a "bee waist shape".

4. The height of the vertebra is equivalent to the height of the normal vertebra and the intervertebral space.

5. The sagittal diameter of the spinal canal is widened (so: cervical spondylotic myelopathy rarely occurs).

6. The foraminal stenosis is dumbbell-shaped or double kidney-shaped (hence: nerve root cervical spondylosis is common).

7. Extensive fusion of blocked vertebrae.

Often can be combined with other limb or spinal deformities (in this case, the combined thumb deformity and the seventh cervical spinal fissure).

If congenital malformation of the butterfly vertebra or hemivertebra is combined, it is a bony torticollis.

Due to the stress concentration of the intervertebral disc between the fused vertebra and the lower normal vertebra, it is easy to cause acquired cervical disc herniation and cause spinal cord symptoms.

Blocked vertebrae are rare in the clinic, and the upper and lower vertebral vertebrae of the vertebrae block, fractures of the articular process, and the vertebral block itself is rare without damage. It may be integrated with the blocked vertebrae, lamina, and spinous processes The increase in intensity is related.