The nerve supply to the human lumbar intervertebral discs

Area of Science:

• Neuroanatomy
• Spinal Anatomy
• Pain Medicine

Background:

• The innervation of the lumbar intervertebral discs is complex and not fully understood.
• Accurate anatomical knowledge is essential for diagnosing and treating spinal pain.
• Previous studies have identified some nerve pathways, but a comprehensive overview is lacking.

Purpose of the Study:

• To elucidate the detailed innervation patterns of the lumbar intervertebral discs.
• To identify all contributing nerve structures and their specific targets within the disc.
• To provide a foundation for understanding the neurobiological basis of discogenic pain.

Main Methods:

• Detailed anatomical dissection of lumbar spine specimens.
• Histological examination of nerve distribution within disc tissues.
• Review of existing anatomical literature on spinal innervation.

Main Results:

• Posterior disc aspects and posterior longitudinal ligament innervated by sinuvertebral nerves.
• Posterolateral discs receive innervation from ventral primary rami and grey rami communicantes.
• Lateral discs and anterior longitudinal ligament innervated by rami communicantes, including paradiscal rami.

Conclusions:

• Lumbar intervertebral discs have a rich and varied nerve supply from multiple sources.
• Sinuvertebral nerves, ventral primary rami, and rami communicantes all contribute to disc innervation.
• Understanding this complex innervation is key to addressing disc-related pain mechanisms.