Serratus Magnus Muscle: Sixth cervical by long thoracic, or External Respiratory Nerve of Bell.
Elbow Joint: Sixth cervical vertebra by musculocutaneous nerve.
Anterior Arm Muscles: Sixth cervical.
Posterior Arm Muscles: Seventh cervical and first dorsal.
Lumbosacral Plexus: This plexus, derived from the anterior primary divisions of the lumbar, sacral, and coccygeal nerves, supplies the muscles and integument of the lower extremity, taking with it axons derived from the sympathetic by the lumbar ganglia to supply the blood-vessels, perspiratory glands and sebaceous glands of this region. The latter are responsive to adjustments of the first or second lumbar vertebrae.
Hip-Joint: Third and fourth lumbar nerves by femoral and obturator or accessory obturator nerves and fifth lumbar or first sacral by the nerve to the quadratus femoris or the great sciatic. Fourth lumbar seems the most potent connection and is usually adjusted for hip-joint disease.
Psoas Magnus Muscles: Anterior branches of the second and third lumbar nerves.
Anterior Thigh Muscles: Supplied mostly through the femoral nerve from the second and third lumbar nerves.
Internal Thigh Muscles: Second and third lumbar nerves (chiefly but not wholly) through the obturator, accessory obturator and femoral nerves.