ANATOMY

Lower Extremities

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Neurovascular contents of the buttock:
Quadrant Contents Symptoms
Upper lateral No major vessels or nerves; A preferred location for -?-intramuscular injection  
Upper medial Superior gluteal neurovascular bundle -?-Abductor lurch
-?-Lower lateral Inferior gluteal neurovascular bundle Difficulty climbing stairs or rising from a chair
Lower medial Sciatic nerve -?-Foot-drop
Intracapsular fractures of the femoral neck or hip dislocations tear the retinacular arteries that supply the -?-Proximal fragment; avascular -?-Necrosis may result.
The femoral triangle is bounded by the -?-Inguinal ligament, the sartorius muscle, and the adductor longus muscle. A femoral pulse is palpable high within the femoral triangle just -?-Inferior to the inguinal ligament. The femoral vein, lying just lateral to the -?-Femoral pulse, is a preferred site for the insertion of the venous lines.
The anterior cruciate ligament is a key stabilizer of the knee joint, preventing posterior movement of the -?-Femur on the tibial plateau.
The medial meniscus, being more -?-Mobile and attached to the medial collateral ligament, is most likely to be injured. Twisting movements that combine lateral -?-Displacement with lateral rotation pull the medial meniscus toward the center of the joint where it may be trapped and crushed by the medial femoral condyle.
The adductor canal, the location of popliteal -?-Aneurysms, contains the femoral artery, femoral vein, and saphenous nerve.
The deep -?-Fibular nerve innervates the muscles of the anterior compartment (dorsiflexors of the foot and pedal digits). The superficial fibular nerve inner-vates the lateral -?-Crural compartment (plantar flexors and everters of the foot). The tibial nerve innervates the posterior crural muscles which plantarflex and -?-Invert the foot.
The posterior tibial artery descends posteriorly to the medial malleolus where the posterior tibial pulse is normally -?-palpable.
Inversion sprains, the most -?-Common ankle injury, involve the lateral collateral ligaments.
The plantar calcaneonavicular (spring) ligament supports the head of the talus and thereby maintains the -?-Longitudinal plantar arch. Laxity of this ligament results in fallen arches or "flat feet."
Sensory distribution of the anterior leg: the web space between the first and second toes is specific for the -?-Fibular nerve.
Nerve Muscle Group Reflex Sign of Functional Deficit
-?-Genito-femoral Cremaster Cremasteric (L2-L3) Cremaster paralysis
Femoral -?-Anterior thigh Patellar (L4) Weakness of hip flexion and loss of knee extension
Obturator Medial thigh   -?-Loss of thigh adduction
-?-Superior gluteal Gluteus medius and minimus   Abductor lurch (inability to keep pelvis level when contralateral fott is raised)
Inferior Gluteal -?-Gluteus maximus   Difficulty rising from seated position and difficulty climbing stairs
Nerve Muscle Group Reflex Sign or Functional Deficit
Sciatic Hamstrings -?-Hamstring (L5) Weakness of hip extension and knee flexion
Fibular Anterior and lateral crural compartments   -?-Foot slap, inability to stand back on heels
Tibial Posertior crural compartment -?-Achilles (S1) Inability to stand on tip-toes
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