Quadriceps femoris ■ Origin: Rectus femoris:anterior inferior iliac spine Vastus medialis:medial lip of linea aspera Vastus lateralis:lateral lip of linea aspera ▣Vastus intermedius: anterior surface of femur Insertion:tibial tuberosity via patellar ligament Action:extends leg at knee joint;rectus femoris also flexes thigh at hip joint Nerve supply:femoral n
Quadriceps femoris ◼ Origin: ❑ Rectus femoris: anterior inferior iliac spine ❑ Vastus medialis: medial lip of linea aspera ❑ Vastus lateralis: lateral lip of linea aspera ❑ Vastus intermedius: anterior surface of femur ◼ Insertion: tibial tuberosity via patellar ligament ◼ Action: extends leg at knee joint; rectus femoris also flexes thigh at hip joint ◼ Nerve supply: femoral n
Tibialis anterior Origin:lateral surface of tibia ■ Insertion:medial cuneiform and base of 1st metatarsal Action:dorsiflexes and inverts foot Nerve supply:deep peroneal n
Tibialis anterior ◼ Origin: lateral surface of tibia ◼ Insertion: medial cuneiform and base of 1st metatarsal ◼ Action: dorsiflexes and inverts foot ◼ Nerve supply: deep peroneal n
Triceps surae Origin: Gastrocnemius:medial and lateral condyles of femur Soleus:soleal line of tibia and upper third of fibula ■ Insertion:calcaneum via tendo calcaneus Action:flexes knee joint and plantarflexes foot at ankle joint;steadies leg on foot during standing Nerve supply:tibial n
Triceps surae ◼ Origin: ❑ Gastrocnemius: medial and lateral condyles of femur ❑ Soleus: soleal line of tibia and upper third of fibula ◼ Insertion: calcaneum via tendo calcaneus ◼ Action: flexes knee joint and plantarflexes foot at ankle joint; steadies leg on foot during standing ◼ Nerve supply: tibial n
Tibialis posterior Origin:posterior surface of tibia and ffibula and interosseous membrane Insertion:tuberosity of navicular,all cuniforms Action:plantarflexes and inverts foot Nerve supply:tibial n
Tibialis posterior ◼ Origin: posterior surface of tibia and ffibula and interosseous membrane ◼ Insertion: tuberosity of navicular, all cuniforms ◼ Action: plantarflexes and inverts foot ◼ Nerve supply: tibial n
Arteries of lower limb Femoral a. Continuation of the external iliac a. Begins midpoint of inguinal ligament Principal branch deep femeral a.股深动脉：arises from the posterolateral surface of the femoral artery about 5 cm below the inguinal ligament. Distributed to all three muscle compartments by medial and lateral femoral circumflex旋股内、外侧动脉 and four perforating arteries穿动脉 of deep femoral a
Arteries of lower limb Femoral a. ◼ Continuation of the external iliac a. ◼ Begins midpoint of inguinal ligament ◼ Principal branch deep femeral a.股深动脉: arises from the posterolateral surface of the femoral artery about 5 cm below the inguinal ligament. ◼ Distributed to all three muscle compartments by medial and lateral femoral circumflex旋股内、外侧动脉 and four perforating arteries 穿动脉 of deep femoral a