Facet joints, or zygapophyseal joints, are true synovial joints in the spine that have been identified as potential pain generators. Medial branch blocks involve the injection of a local anesthetic ...

Because each lumbar facet joint is innervated by two medial branches of the primary dorsal ramus, both must be anesthetized to completely block a single joint. For example, to block the L4-L5 facet ...

Last month we discussed that the higher level (L1-L2, L2-L3 and L3-L4) lumbar disc herniations present significantly different than the more common lower level (L4-L5 and L5-S1) lumbar disc ...

A 62 year-old man complained of pain in the back, buttocks and thighs after walking two blocks. The pain was relieved with sitting, but not standing. Lumbar Spinal Stenosis: T2-weighted MRI of the ...

The treatment of chronic sciatica caused by herniation of a lumbar disk has not been well studied in comparison with acute disk herniation. Data are needed on whether diskectomy or a conservative ...

Axial MRI of the Lumbar Spine - T2 weighted image at the L4 level. On this view centered over the L4-L5 disk, one can see well the cauda equina surrounded by CSF (note that CSF is bright on ...

Tiger Woods announced Saturday that he has another surgery on his back. The 15-time major champion posted on social media that he underwent an L4-L5 disc replacement surgery on his lumbar spine. The ...