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Physical Therapy Tool

Lumbosacral Plexus Muscle Visualizer

Select a muscle to view its origin, insertion, action, innervation, nerve roots, and a highlighted lumbosacral plexus pathway.

Selected muscle

Gluteus medius

L4 / L5 / S1

Abducts and internally rotates the hip; stabilizes pelvis during single-limb stance.

Nerve
Superior gluteal nerve
Branch type
Sacral plexus branch
Region
Gluteal region
Roots
L4, L5, S1
Active nerve route
Yellow = selected root contribution and pathway to the selected muscle.
T12L1L2L3L4L5S1S2S3S4
RootsPlexusDivisionsPathwayBranchMuscleT12L1L2L3L4L5S1S2S3S4LumbarT12–L4L/S trunkL4–L5SacralL4–S4AnteriordivisionPosteriordivisionSciaticmajor path
Superior gluteal nerve
Sacral plexus branch
Muscle
Gluteus medius
Gluteal region
Origin
External ilium between anterior and posterior gluteal lines
Insertion
Lateral surface of greater trochanter
Action
Abducts and internally rotates the hip; stabilizes pelvis during single-limb stance.
Innervation
Superior gluteal nerve
T12L1L2L3L4L5S1S2S3S4
Clinical anatomy note

This is designed as a high-yield study visualizer, not a surgical atlas. Root levels and branch patterns can vary by source and by person. The list focuses on major skeletal muscles supplied by motor branches of the lumbar and sacral plexuses, including abdominal wall contributions, hip, thigh, leg, and intrinsic foot muscles.