Podcast
Questions and Answers
What is the primary action of the gracilis muscle?
What is the primary action of the gracilis muscle?
Which nerve supplies the gracilis muscle?
Which nerve supplies the gracilis muscle?
What area is described as a continuation of the apex of the femoral triangle?
What area is described as a continuation of the apex of the femoral triangle?
Why is the gracilis muscle preferred as a muscle graft?
Why is the gracilis muscle preferred as a muscle graft?
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Which muscle is described as a composite muscle in the medial compartment?
Which muscle is described as a composite muscle in the medial compartment?
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What is the blood supply to the gracilis muscle primarily derived from?
What is the blood supply to the gracilis muscle primarily derived from?
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Which action is NOT performed by the gracilis muscle?
Which action is NOT performed by the gracilis muscle?
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What content is found within the adductor canal?
What content is found within the adductor canal?
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What is the primary action of the obturator externus muscle?
What is the primary action of the obturator externus muscle?
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Which nerve supplies the muscles of the medial compartment of the thigh?
Which nerve supplies the muscles of the medial compartment of the thigh?
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From where does the obturator artery emerge?
From where does the obturator artery emerge?
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What is the role of the posterior branch of the obturator artery?
What is the role of the posterior branch of the obturator artery?
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How does the obturator nerve enter the thigh?
How does the obturator nerve enter the thigh?
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What supplies the medial aspect of the thigh?
What supplies the medial aspect of the thigh?
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What anatomical landmark is associated with the insertion of the obturator externus?
What anatomical landmark is associated with the insertion of the obturator externus?
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Which of the following muscles is NOT primarily innervated by the obturator nerve?
Which of the following muscles is NOT primarily innervated by the obturator nerve?
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What surgical procedure can relieve adductor spasm in spastic paraplegia?
What surgical procedure can relieve adductor spasm in spastic paraplegia?
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What is another name for the adductor canal?
What is another name for the adductor canal?
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Which nerve typically receives branches from the subsartorial plexus?
Which nerve typically receives branches from the subsartorial plexus?
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Where does the femoral artery exit the adductor canal?
Where does the femoral artery exit the adductor canal?
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What is the function of the saphenous nerve in the adductor canal?
What is the function of the saphenous nerve in the adductor canal?
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Which artery branches off from the femoral artery above the adductor hiatus?
Which artery branches off from the femoral artery above the adductor hiatus?
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Which nerve lies lateral to the femoral artery?
Which nerve lies lateral to the femoral artery?
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What condition might necessitate a percutaneous adductor tenotomy?
What condition might necessitate a percutaneous adductor tenotomy?
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What is the primary action of the adductor longus muscle?
What is the primary action of the adductor longus muscle?
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From which anatomical structure does the adductor brevis muscle arise?
From which anatomical structure does the adductor brevis muscle arise?
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Which nerve supplies the adductor part of the adductor magnus muscle?
Which nerve supplies the adductor part of the adductor magnus muscle?
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What anatomical feature allows for the passage of femoral vessels in adductor magnus?
What anatomical feature allows for the passage of femoral vessels in adductor magnus?
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Which adductor muscle helps in flexion of the hip joint?
Which adductor muscle helps in flexion of the hip joint?
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What is the primary action of the hamstring part of the adductor magnus muscle?
What is the primary action of the hamstring part of the adductor magnus muscle?
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Which structure can be mistakenly referred to as 'riders' bones'?
Which structure can be mistakenly referred to as 'riders' bones'?
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Which muscle is considered the largest and deepest muscle of the medial compartment of the thigh?
Which muscle is considered the largest and deepest muscle of the medial compartment of the thigh?
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Study Notes
Medial (Adductor) Compartment of the Thigh
- The medial compartment of the thigh contains muscles responsible for adduction, flexion, and medial rotation of the hip and leg
- Muscles include: Gracilis, Sartorius, Semitendinosus, Adductor Longus, Adductor Brevis, Adductor Magnus
- Gracilis is a primary muscle of the medial compartment, arising from the inferior pubic and adjacent ischial ramus and inserting into the upper medial tibia. It is often preferred as a muscle graft for various procedures
- Adductor Longus arises from the pubic body; its fibres flatten out and insert into the middle third of the linea aspera. It's a powerful thigh adductor.
- Adductor Brevis originates from the body and inferior ramus of the pubis; it widens into a triangular shape, inserting into the upper part of linea aspera. It is an adductor of the thigh.
- Adductor Magnus is the largest and deepest muscle of the compartment. It's a composite muscle formed by the fusion of adductor and hamstring masses, each having its own nerve supply. It inserts into the medial supracondylar line, linea aspera, and the gluteal tuberosity.
- Obturator Externus arises from the obturator membrane and anterior margin of the obturator foramen; it inserts into a deep pit on the medial surface of the greater trochanter. It rotates the femur laterally at the hip joint.
- Obturator Nerve Innervates the medial compartment muscles, originating from the lumbar plexus, passing through the obturator foramen, and dividing into anterior and posterior divisions.
- Obturator Artery emerges from the obturator foramen; it branches into anterior and posterior branches encircling the foramen, often anastomosing with the medial circumflex femoral artery.
Learning Objectives
- Describe the attachments, innervations, and actions of the medial compartment muscles.
- Explain why Gracilis is a preferred muscle graft.
- Describe strains/tears of adductor longus.
- Explain why Adductor Magnus is a composite muscle.
- Describe the course of the obturator nerve and artery.
- Describe the adductor canal, its contents, and its connection to the femoral triangle. Explain adductor canal block.
- Explain how obturator neurectomy and adductor tenotomy can treat intractable spastic paraplegia
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Description
This quiz covers the anatomy and functions of the medial compartment of the thigh, focusing on key muscles involved in hip and leg movement. Learn about the Gracilis, Adductor Longus, Adductor Brevis, and Adductor Magnus, and their roles in adduction, flexion, and medial rotation. Test your knowledge of their origins, insertions, and functions.
