2. You’re an orthopedic surgeon treating a patient who dislocated her hip in a b

Question

2. You’re an orthopedic surgeon treating a patient who dislocated her hip in a bus accident. When paramedics arrived at the scene of the accident, the injured woman’s thigh was flexed, adducted and medially rotated. Name the muscles, (and provide their origins and insertions) that produce this action. Hip dislocations can be classified as anterior or posterior, depending on which direction the head of the femur is facing after it dislocates. Based on the description above, which type of dislocation did this woman suffer? Explain your answer by indicating which muscles are not producing the actions that they should. Are these the same muscles that you indicated in the first part?

Explanation / Answer

Muscles which lead to flexion,adduction and medial/internal rotation.

Gracilis - Origin: pubic crest

Insertion: medial condyle of tibia

Pectineous - O: pubic crest or ramus I: below the linea aspera

Adductor brevis - Origin: Inferior ramus of pubis • Insertion: Pectineal line (linea aspera)

Adductor longus - O: front of the pubis just below its crest • I: middle third of the linea aspera

Adductor magnius - O: edge of the pubic crest and ischial tuberosity • I: linea aspera

Rectus Femoris - Origin: anterior-inferior iliac spine of the ilium • Insertion: top of the patella and patellar ligament to the tibial tuberosity

The woman suffers from posterior dislocation as in this dislocation leaves the lower leg in a fixed position, with the knee and foot rotated in toward the middle of the body.

Gluteus maximus - O: lower posterior iliac crest and posterior surface of the sacrum • I: gluteal tuberosity (upper, posterior aspect of the femur) & I.T. band

Tensor fascia latae - O: iliac crest • I: iliotibial (I.T.) band

Related Questions

Navigate

• Browse (All)
• Browse 2
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.