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[Lumbar intervertebral disk. Intervertebral disk-vertebral body pathways and discal vascularization]
Bulletin De L'Association Des Anatomistes
|December 1, 1994
Summary
Adult intervertebral discs have limited blood supply. However, defects in the vertebral bone allow vascularized tissue to reach the disc, potentially supplying nutrients.
Area of Science:
- Anatomy
- Histology
- Vascular Biology
Context:
- The intervertebral disc (IVD) is crucial for spinal function.
- Understanding IVD vascularization is key to comprehending disc degeneration and nutrient supply.
- Previous research suggests limited vascularity in adult IVDs.
Purpose:
- To investigate the vascular supply of the adult human intervertebral disc (IVD).
- To explore the disco-vertebral interface and potential nutrient pathways.
- To compare vascularization in adult and infant IVDs.
Summary:
- This study examined the blood supply of human lumbar intervertebral discs (L3-L4, L4-L5, L5-S1) using ink infusion and immunohistological methods.
- Findings confirm reduced vascularity in adult IVDs compared to infants.
- Numerous defects in the subchondral vertebral plate were observed, filled with vascularized medullary tissue in contact with the cartilaginous disc endplate.
Impact:
- Identifies potential alternative nutrient pathways to the adult intervertebral disc through vertebral defects.
- Suggests a mechanism for nutrient delivery to avascular disc tissue, similar to other cartilaginous structures.
- Provides insights into the pathophysiology of disc degeneration and potential therapeutic targets.