Review Question - QID 5968

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Adult Dysplasia of the Hip Treatment Operative QID: 5968 (SAE07HK.8)

QID 5968 (Type "5968" in App Search)

Based on the radiograph shown in Figure 4, the innervation of what muscle is most at risk with total hip arthroplasty?

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Quadriceps

91/1005

Extensor hallucis longus

67%

673/1005

Lateral gastrocnemius

63/1005

Adductor magnus

42/1005

Semitendinosus

13%

127/1005

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The radiograph reveals a Crowe IV deformity in a patient with developmental dysplasia of the hip. If hip arthroplasty is performed, then some degree of limb lengthening is anticipated. Excessive limb lengthening can result in sciatic nerve palsy in these patients. The peroneal branch of the sciatic nerve is most often affected. Of the muscles listed, only the extensor hallucis longus is innervated by the peroneal branch of the sciatic nerve.