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Anatomical study on the relationship between the dorsal root ganglion and the intervertebral disc in the lumbar spine.

Vialle E, Vialle LR, Contreras W, Jacob C - Rev Bras Ortop (2015)

Bottom Line: The measurements obtained were constant, without significant differences between levels or any laterality.Precise localization of the ganglion shows that the safety margin for minimally invasive procedures is less than what is presented in studies that only involve measurements of the nerve root, thus perhaps explaining the presence of neuropathic pain after some of these procedures.Abstract available from the publisher.

View Article: PubMed Central - PubMed

Affiliation: Hospital Universitário Cajuru, Pontifícia Universidade Católica do Paraná, Curitiba, PR, Brazil.

ABSTRACT

Objective: To describe the location of the dorsal root ganglion in relation to the intervertebral disc, including the "triangular" safety zone for minimally invasive surgery in the lumbar spine.

Methods: Eight adult cadavers were dissected bilaterally in the lumbar region, using a posterolateral approach, so as to expose the L3L4 and L4L5 spaces, thereby obtaining measurements relating to the space between the intervertebral disc, pedicles cranial and caudal to the disc, path of the nerve root, dorsal ganglion and safety triangle.

Results: The measurements obtained were constant, without significant differences between levels or any laterality. The dorsal ganglion occupied the lateral border of the triangular safety zone in all the specimens analyzed.

Conclusion: Precise localization of the ganglion shows that the safety margin for minimally invasive procedures is less than what is presented in studies that only involve measurements of the nerve root, thus perhaps explaining the presence of neuropathic pain after some of these procedures.

No MeSH data available.


Related in: MedlinePlus

Anatomical exposure of the nerve root, intervertebral disc (ID), dorsal root ganglion (DRG), pedicle and dural sac.
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fig0005: Anatomical exposure of the nerve root, intervertebral disc (ID), dorsal root ganglion (DRG), pedicle and dural sac.

Mentions: The cadavers were positioned in ventral decubitus and a posterior access route in a single layer was constructed. Extensive laminectomy was then performed on the lumbar spine, to expose the dural sac, the lumbar roots with their respective DRGs, the pedicles and the intervertebral discs (Fig. 1). The segment L5-S1 was not studied because of the need for more extensive dissection and possible damage to the anatomical specimen. Using a straight osteotome, osteotomy was performed on the joint facets and lateral recess, and the anatomical structures of the intervertebral foramen were viewed.


Anatomical study on the relationship between the dorsal root ganglion and the intervertebral disc in the lumbar spine.

Vialle E, Vialle LR, Contreras W, Jacob C - Rev Bras Ortop (2015)

Anatomical exposure of the nerve root, intervertebral disc (ID), dorsal root ganglion (DRG), pedicle and dural sac.
© Copyright Policy - CC BY-NC-ND
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4563044&req=5

fig0005: Anatomical exposure of the nerve root, intervertebral disc (ID), dorsal root ganglion (DRG), pedicle and dural sac.
Mentions: The cadavers were positioned in ventral decubitus and a posterior access route in a single layer was constructed. Extensive laminectomy was then performed on the lumbar spine, to expose the dural sac, the lumbar roots with their respective DRGs, the pedicles and the intervertebral discs (Fig. 1). The segment L5-S1 was not studied because of the need for more extensive dissection and possible damage to the anatomical specimen. Using a straight osteotome, osteotomy was performed on the joint facets and lateral recess, and the anatomical structures of the intervertebral foramen were viewed.

Bottom Line: The measurements obtained were constant, without significant differences between levels or any laterality.Precise localization of the ganglion shows that the safety margin for minimally invasive procedures is less than what is presented in studies that only involve measurements of the nerve root, thus perhaps explaining the presence of neuropathic pain after some of these procedures.Abstract available from the publisher.

View Article: PubMed Central - PubMed

Affiliation: Hospital Universitário Cajuru, Pontifícia Universidade Católica do Paraná, Curitiba, PR, Brazil.

ABSTRACT

Objective: To describe the location of the dorsal root ganglion in relation to the intervertebral disc, including the "triangular" safety zone for minimally invasive surgery in the lumbar spine.

Methods: Eight adult cadavers were dissected bilaterally in the lumbar region, using a posterolateral approach, so as to expose the L3L4 and L4L5 spaces, thereby obtaining measurements relating to the space between the intervertebral disc, pedicles cranial and caudal to the disc, path of the nerve root, dorsal ganglion and safety triangle.

Results: The measurements obtained were constant, without significant differences between levels or any laterality. The dorsal ganglion occupied the lateral border of the triangular safety zone in all the specimens analyzed.

Conclusion: Precise localization of the ganglion shows that the safety margin for minimally invasive procedures is less than what is presented in studies that only involve measurements of the nerve root, thus perhaps explaining the presence of neuropathic pain after some of these procedures.

No MeSH data available.


Related in: MedlinePlus