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Questions and Answers
Which nerves innervate muscles and joints in the lower extremities?
Which nerve innervates most hip flexors and all knee extensors?
Which nerve innervates the hip adductor muscles?
Which plexus innervates the posterior hip muscles?
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What is the widest and longest nerve in the body?
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Which portion of the sciatic nerve innervates biarticular muscles within the hamstring group and the posterior head of the adductor magnus?
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Which portion of the sciatic nerve innervates the short head of the biceps femoris?
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What receives sensory innervation through the same nerve roots that supply the overlying muscles?
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Which nerves primarily supply sensory fibers to the anterior hip capsule?
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Which nerves primarily supply sensory fibers to the posterior hip capsule?
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Which nerve innervates the gluteus maximus muscle?
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Which nerve innervates the hip abductor muscles?
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Study Notes
- The lumbar plexus and sacral plexus innervate muscles and joints in the lower extremities.
- The femoral nerve innervates most hip flexors and all knee extensors.
- The obturator nerve innervates the hip adductor muscles.
- The sacral plexus innervates the posterior hip muscles.
- The sciatic nerve is the widest and longest nerve in the body.
- The tibial portion of the sciatic nerve innervates biarticular muscles within the hamstring group and the posterior head of the adductor magnus.
- The common fibular portion of the sciatic nerve innervates the short head of the biceps femoris.
- The hip capsule, ligaments, and parts of the acetabular labrum receive sensory innervation through the same nerve roots that supply the overlying muscles.
- The anterior capsule receives sensory fibers primarily from the femoral and obturator nerves.
- The posterior capsule receives sensory fibers from nerve roots originating from the sacral plexus, carried primarily through the sciatic and superior gluteal nerves.
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