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What is congenital block vertebrae?

What is congenital block vertebrae?

Block vertebra is a congenital failure of segmentation of somites. Secondary to the fusion, these vertebrae are not amenable to degenerative changes, however the additional stress is transferred on to the distal joint. They may be accompanied by neural foraminal narrowing or enlargement.

What nerves are affected by C4 C5 C6?

Roots. The C4 and C5 roots give rise to the dorsal scapular nerve that supplies the rhomboids and levator scapulae.

  • Trunks. From the upper trunk C5 and C6 give rise to the nerve to the subclavius, and the suprascapular nerve, that supply the subclavius muscle, and the supra- and infraspinatus muscles, respectively.
  • Cords.

    • What does block vertebrae mean?

    Block vertebra is a type of vertebral anomaly where there is a failure of separation of two or more adjacent vertebral bodies. It is an anatomic variant.

    What is the most common location for a congenital block vertebra?

    The most common location is the midthoracic vertebrae, especially the eighth (T8). Neurologic signs result from severe angulation of the spine, narrowing of the spinal canal, instability of the spine, and luxation or fracture of the vertebrae.

    What is the most common congenital spinal defect?

    Neural tube defects affect the brain and spinal cord, and are among the most common of the congenital anomalies (see Fig. 4.1).

    Can C4-C5 cause headaches?

    It has been reported that pain from the C2-3 and C3-4 cervical facet joints can radiate to the occipital area, frontotemporal and even periorbital regions. Even pathology in C5 or C6 nerve roots have been reported to cause headache.

    Where is C4 and C5 in the neck?

    The C3, C4, and C5 vertebrae form the midsection of the cervical spine, near the base of the neck. A cervical vertebrae injury is the most severe of all spinal cord injuries because the higher up in the spine an injury occurs, the more damage that is caused to the central nervous system.

    What is C4-C5 degenerative disc?

    A C4-C5 herniated or bulging disc can also occur from deterioration that occurs in the disc over time. The discs may deteriorate from wear and tear or because of degenerative disc disease causing a weak outer layer of the disc, or annulus fibrosis, which can cause a C4-C5 bulging disc over time.

    Can having an extra vertebrae cause back pain?

    A Sixth Lumbar Vertebra Having one extra lumbar vertebra provides no advantage or disadvantage to the individual and is rarely a cause of back problems, but it can create some confusion.

    How common is it to have 4 lumbar vertebrae?

    The prevalence of 6 lumbar vertebrae was 0.8% (n = 23), and the prevalence of 4 lumbar vertebrae was 1.8% (n = 54).

    What are congenital spinal abnormalities?

    Congenital spine abnormalities are disorders of the spine that develop very early in life. Many congenital spine abnormalities are related to spina bifida. Other common congenital spine abnormalities include tethered spinal cord and abnormal spinal alignment such as kyphosis, lordosis and scoliosis.