11/12/2025
๐ ๐๐ซ๐ ๐ง๐๐ซ๐ฏ๐๐ฌ ๐ข๐ง ๐ญ๐ก๐ ๐๐ฎ๐ฆ๐๐๐ซ ๐
๐จ๐ซ๐๐ฆ๐๐ง ๐๐๐๐ฅ๐ฅ๐ฒ ๐๐ก๐๐ญ ๐๐๐ฌ๐ฒ ๐ญ๐จ ๐๐จ๐ฆ๐ฉ๐ซ๐๐ฌ๐ฌ?
๐ The lumbar intervertebral foramen is formed by the vertebral body, pedicles, intervertebral disc, superior and inferior articular processes, ligamentum flavum, and the zygapophyseal (facet) joint.
๐ ๐จ ๐๐๐๐๐๐๐ ๐๐ ๐๐๐๐๐๐๐๐๐
๐๐๐๐ ๐๐๐๐๐๐๐๐? subcompartments and stabilized by transforaminal ligaments, through which the nerve root, dorsal root ganglion (DRG), radicular artery and veins, and lymphatics pass. Nerve roots and the DRG exit the dural sac and course through the lateral recess to the superior and anterior region of the foramen.
๐ ๐๐ง๐๐ญ๐จ๐ฆ๐ข๐๐๐ฅ & ๐๐๐ญ๐ก๐จ๐ฉ๐ก๐ฒ๐ฌ๐ข๐จ๐ฅ๐จ๐ ๐ข๐๐๐ฅ ๐๐ง๐ฌ๐ข๐ ๐ก๐ญ๐ฌ:
1. ๐ญ๐๐๐๐๐๐ ๐๐๐๐ ๐๐๐
๐๐๐๐๐ ๐๐๐๐๐๐ ๐๐ ๐๐๐๐๐:
โข From L1 to L4, foraminal size gradually increases.
โข At L5โS1, the foramen is significantly smallerโeven though paradoxically, the L5 nerve root is the largest among all lumbar nerves โ higher compression risk at this level.
2. ๐ต๐๐๐๐ ๐๐๐๐ ๐๐๐๐ ๐๐๐๐๐๐๐:
โข The L5 nerve root occupies 25โ30% of the foramenโs volume, while others range from 7โ22% โ L5 is the most vulnerable to impingement.
3. ๐ป๐๐ ๐๐๐๐๐๐ ๐๐๐๐๐๐๐ ๐๐ ๐๐๐ ๐ ๐๐๐๐๐
, ๐๐๐๐๐๐ ๐๐๐๐๐๐.
๐ฐ๐๐๐๐๐๐
:
โข Itโs a dynamic space, oval or teardrop-shaped, segmented into compartments stabilized by ligaments.
โข Nerve roots and the dorsal root ganglion (DRG) are not โfixedโ; they can glide and โflossโ within the space, adapting to postural changes and loading.
โข Not all levels or sides of the spine have consistent transforaminal ligament presence.
๐ Nurmukhametov R. et al., Brain Sci. 2024
Disclaimer:
๐ Sharing a study is NOT an endorsement.
๐ You should read the original research yourself and be critical.