Podcast
Questions and Answers
Which of the following is a primary muscle involved in hip internal rotation?
Which of the following is a primary muscle involved in hip internal rotation?
What is the typical range of motion for hip internal rotation when the knee is flexed?
What is the typical range of motion for hip internal rotation when the knee is flexed?
Which factor limits the motion of hip internal rotation when the hip is extended?
Which factor limits the motion of hip internal rotation when the hip is extended?
Which accessory muscle assists in hip internal rotation?
Which accessory muscle assists in hip internal rotation?
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What is one effect of weakness in hip internal rotation?
What is one effect of weakness in hip internal rotation?
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Which muscle is primarily responsible for abduction and medial rotation of the hip joint?
Which muscle is primarily responsible for abduction and medial rotation of the hip joint?
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What is the primary nerve supply for both the gluteus minimus and tensor fascia latae muscles?
What is the primary nerve supply for both the gluteus minimus and tensor fascia latae muscles?
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What happens to the range of motion for hip internal rotation with the knee in extension?
What happens to the range of motion for hip internal rotation with the knee in extension?
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Study Notes
Hip Internal Rotation
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Objectives: Students will identify primary muscles involved in hip internal rotation, range of motion, effects of weakness and contracture.
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Content: Focuses on primary and accessory muscles, range of motion (with knee flexion and extension), testing procedures, effects of weakness and contracture.
Primary Muscles
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Gluteus Minimus
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Tensor Fascia Latae
Accessory Muscles
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Gluteus Medius
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Semitendinosus
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Semimembranosus
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Superior portion of Adductor Magnus
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Adductors Brevis and Longus
Range of Motion
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Flexion: 45 degrees of internal rotation.
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Extension: Reduced range of motion compared to flexion.
Factors Limiting Motion
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Iliofemoral ligament (hip extended)
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Ischiocapsular ligament (hip flexed)
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Hip External Rotator Muscles
Anatomy of Gluteus Minimus
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Origin: External surface of ilium, between anterior and inferior gluteal lines, margin of greater sciatic notch.
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Insertion: Anterior border of greater trochanter of femur and hip joint capsule.
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Nerve Supply: Superior gluteal nerve.
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Action: Abduction, medial rotation, and assists in hip flexion.
Anatomy of Tensor Fascia Latae
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Origin: Outer surface of anterior iliac crest, between tubercle of iliac crest and anterior superior iliac spine.
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Insertion: Iliotibial tract into the anterior surface of lateral condyle of tibia.
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Nerve Supply: Superior gluteal nerve.
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Action: Flexion, abduction, and internal rotation of hip. Aids in maintaining knee extension in standing.
Effect of Weakness
- Weakness of internal rotators leads to lateral rotation and abduction of the thigh.
Effect of Contracture/Shortening
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Knock-knee (valgus) position
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Impaired lateral rotation
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Inability to sit in cross-legged position
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Description
This quiz focuses on the primary and accessory muscles involved in hip internal rotation, their anatomical features, and the implications of strength and range of motion. Students will assess their understanding of factors that limit motion and the anatomy of key muscles such as the gluteus minimus and tensor fascia latae.
