Biceps femors short head

Origin	Lateral lip of linea aspera, lateral supracondylar ridge of femur, and lateral intermuscular septum of thigh
Insertion	Primarily on fibular head; also on lateral collateral ligament and lateral tibial condyle
Action	Flexes the knee, and also rotates the tibia laterally; long head also extends the hip joint
Innervation	Common peroneal nerve (L5, S1, S2)
Arterial Supply	Perforating branches of profunda femoris artery, inferior gluteal artery, and the superior muscular branches of popliteal artery

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(OBQ04.228) Which of the following nerves innervates the short head of biceps femoris? Topic

Review Topic

1. peroneal division of the sciatic nerve
2. tibial division of the sciatic nerve
3. femoral nerve
4. superior gluteal nerve
5. saphenous nerve

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DISCUSSION: The biceps femoris has two heads as its name implies. Each head has its own nerve supply. The long head is innervated by the tibial branch of the sciatic nerve (L5, S1, S2, and S3). The short head is innervated by the peroneal branch of the sciatic nerve (L5, S1, and S2). Thus answer 1 is the correct choice.

REFERENCES:

1. Hoppenfeld S, deBoer P: Surgical Exposures in Orthopaedics, Philadelphia, PA, Lippincott, 1977

2. Jenkins DB (ed): Hollinshead’s Functional Anatomy of the Limbs and Back, ed 6, Philadelphia, PA, WB Saunders, 1991

Question Authors:

Paul D. Kim MD, Derek Moore, Patrick McCulloch MD,

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Textbooks

Review of Orthopaedics, 6th Edition, Mark D. Miller MD, Stephen R. Thompson MBBS MEd FRCSC, Jennifer Hart MPAS PA-C ATC, an imprint of Elsevier, Philadelphia, Copyright 2012
AAOS Comprehensive Orthopaedic Review, Jay R. Leiberman. Published by American Academy of Orthopaedic Surgeons, Rosemont IL. Copyright 2009
Orthopaedic Knowledge Update 10, John M Flyn. Published by American Academy of Orthopaedic Surgeons, Rosemont IL. Copyright 2011
Hoppenfeld SP. Surgical Exposures in Orthopaedics: The Anatomic Approach. Lipponcott, Williams, and Wilkins, Philadelphia, PA, Copyright 2009
Orthopaedic In-training Examination (OITE) Questions 2004-2012, American Academy of Orthopaedic Surgeons, Rosemont IL. Copyright 2004-2012
Self-Assessment Examination (SAE) Questions 2004-2012, American Academy of Orthopaedic Surgeons, Rosemont IL. Copyright 2004-2012

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Hoppenfeld S, deBoer P: Surgical Exposures in Orthopaedics, Philadelphia, PA, Lippincott, 1977
Jenkins DB (ed): Hollinshead’s Functional Anatomy of the Limbs and Back, ed 6, Philadelphia, PA, WB Saunders, 1991

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