Neuro Atlas
Six layers of human neuroanatomy.
An interactive body and head, from body regions to neurocutaneous fields. Every structure links onward to its educational page and to the formulations mapped to it. Layers are extended as the atlas is revised.
Lumbar
Body Regions · Layer 1
Lumbar
L1 · L2 · L3 · L4 · L5
Thoracolumbar junction and lumbar plexus projection field, extending toward the anterior thigh.
Geometry: schematic placeholder. This structure is a data object awaiting verified vector geometry; the projection shown asserts no anatomical detail.
Formulation
- TLO DUOThoracolumbar transition concept for the mid-to-lower back application field.→
- Plexus Lumbalis DUOLumbar plexus concept covering the lower back and anterior thigh projection field.→
- Plexus Lumbosacralis DUOTransition concept for the lumbosacral field, where lumbar and sacral territories meet across the pelvic rim.→
Metamer
Peripheral nerve
- Medial branches of the dorsal ramiC2–S4 — Paraspinal surface strips immediately lateral to the spinous processes.→
- Iliohypogastric nerveL1 — Suprapubic and lateral gluteal surface.→
- Lateral femoral cutaneous nerveL2–L3 — Lateral thigh surface.→
- Femoral nerveL2–L4 — Anterior thigh and, via the saphenous branch, medial leg.→
Schematic vector illustrations for orientation and education. Surface maps are simplified representations; published dermatome maps differ between sources.
Knowledge graph
Related knowledge
Structures in the atlas are connected to nerves, formulations, articles and reference sheets.
Formulation
Metamer
Peripheral nerve
Knowledge article