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Lower Extremity Muscles - Coggle Diagram

- - - - O: sides of T12-L5 vertebrae and discs between them, transverse processes of all lumbar vertebrae
      - I: lesser trochanter of femur
      - A: flexes thigh at hip joint
      - Innervation: femoral nerve
    - - O: ASIS
      - I: pes anserine on medial tibia
      - A: flexes, abduct, ER of thigh at hip joint, flexes leg at knee joint
      - Innervation: femoral nerve
    - - O: superior rami of pubis
      - I: pectineal line of femur, just inferior to lesser trochanter
      - A: adducts and flexes thigh, assists with IR of thigh
      - Innervation: femoral nerve
    - - Rectus femoris
        
        O: AIIS and ilium superior to acetabulum
        
        I: common quadriceps tendon
        
        A: extends knee, helps iliopsoas flex hip
        
        Innervation: femoral nerve
      - Vastus lateralis
        
        O: greater trochanter and lateral lip of linea aspera
        
        I: common quadriceps tendon
        
        A: knee extension
        
        Innervation: femoral nerve
      - Vastus medialis
        
        O: intertrochanteric line and medial lip of linea aspera
        
        I: common quadriceps tendon
        
        A: extends knee
        
        Innervation: femoral nerve
      - Vastus intermedialis
        
        O: anterior and lateral surface of shaft of femur
        
        I: common quadriceps tendon
        
        A: knee extension
        
        Innervation: femoral nerve
  - - - O: body of pubis inferior to pubic crest
      - I: middle third of linea aspera
      - A: adducts thigh
      - Innervation: obturator nerve
    - - O: body and inferior ramus of pubis
      - I: pectineal line and proximal part of linea aspera
      - A: adducts thigh, slight flexion
      - Innervation: obturator nerve
    - - Adductor part
        
        O: inferior ramus of pubis and ramus of ischium
        
        I: gluteal tuberosity, linea aspera, medial supracondylar line
        
        A: adducts thigh, flexes thigh
        
        Innervation: obturator nerve
      - Hamstring part
        
        O: ischial tuberosity
        
        I: adductor tubercle of femur
        
        A: adducts thigh, extends thigh
        
        Innervation: tibial nerve (sciatic)
    - - O: body and inferior ramus of pubis
      - I: superior part of medial surface of tibia
      - A: adducts, flexes thigh, IR
      - Innervation: obturator nerve
  - - - O: ischial tuberosity
      - I: medial surface of superior part of tibia
      - A: extends hip, when knee flexed - hip flexion and IR
      - Innervation: tibial nerve
    - - O: ischial tuberosity
      - I: pes anserine
      - A: hip extension, flex and IR knee
      - Innervation: tibial nerve
    - - Long head
        
        O: ischial tuberosity
        
        I: lateral side of head of fibula
        
        A: flexes leg and ER when knee flexed, hip extension
        
        Innervation: tibial nerve
      - Short head
        
        O: linea aspera and lateral supracondylar line of femur
        
        I: lateral side of head of fibula
        
        A: flexes leg and ER when knee flexed, hip extension
        
        Innervation: common fibular nerve
- - - - O: lateral condyle and superior half of lateral surface of tibia and interosseous membrane
      - I: medial and inferior surfaces of medial cuneiform and base of 1st metatarsal
      - A: DF and inverts foot
      - Innervation: deep fibular nerve
    - - O: lateral condyle of tibia and superior 3/4 of medial surface of fibula and interosseous membrane
      - I: middle and distal phalanges of lateral 4 digits
      - A: DF ankle and extends lateral 4 digits
      - Innervation: deep fibular nerve
    - - O: middle part of anterior surface of fibula and interosseous membrane
      - I: dorsal aspect of base of distal phalanx of big toe
      - A: DF ankle and extends big toe
      - Innervation: deep fibular nerve
    - - I: dorsum of base of 5th metatarsal
      - A: DF ankle and eversion of foot
      - O: inferior 1/3 of anterior surface of fibula and interosseous membrane
      - Innervation: deep fibular nerve
  - - - O: head and superior 2/3 of lateral surface of fibula
      - I: base of 1st metatarsal and medial cuneiform
      - A: PF ankle and everts foot
      - Innervation: superficial fibular nerve
    - - O: inferior 2/3 of lateral surface of fibula
      - I: tuberosity on 5th metatarsal
      - A: PF ankle and everts foot
      - Innervation: superficial fibular nerve
  - - - O: interosseous membrane, posterior surface of tibia inferior to soleal line, posterior surface of fibula
      - I: tuberosity of navicular, cuneiform, cuboid, and sustentaculum tali of calcaneus, bases of 2-4th metatarsals
      - A: PF ankle, inverts foot
      - Innervation: tibial nerve
    - - O: medial part of posterior surface of tibia inferior to soleal line, by broad tendon to fibula
      - I: bases of distal phalanx of lateral 4 digits
      - A: flexes lateral 4 digits, PF ankle, supports longitudinal arch
      - Innervation: tibial nerve
    - - O: inferior 2/3 of posterior surface of fibula, inferior part of interosseous membrane
      - I: base of distal phalanx of hallux
      - A: flexes big toe, PF ankle (weak), supports medial longitudinal arch
      - Innervation: tibial nerve
  - - - O: lateral head - lateral aspect of lateral condyle of femur, medial head - popliteal surface of femur
      - I: achilles tendon
      - A: PF ankle, knee flexion
      - Innervation: tibial nerve
    - - O: inferior end of lateral supracondylar line fo femur, oblique popliteal ligament
      - I: achilles tendon
      - A: weakly PF
      - Innervation: tibial nerve
    - - O: posterior aspect of head and superior 1/4 of posterior surface of fibula, soleol line and middle 1/3 of medial border of tibia, tendinous arch extending between them
      - I: achilles tendon
      - A: PF ankle
      - Innervation: tibial nerve
- - - - Abductor hallucis
        
        O: medial tubercle of calcaneus tuberosity, flexor retinaculum, plantar aponeurosis
        
        I: medial side of base of proximal phalanx of 1st digit
        
        A: abduct and flex big toe
        
        Innervation: medial plantar nerve
      - Flexor digitorum brevis
        
        O: medial tubercle of calcaneus tuberosity, plantar aponeurosis, intermuscular septa
        
        I: both side of middle phalanx of lateral 4 digits
        
        A: flexes lateral 4 digits
        
        Innervation: medial plantar nerve
      - Abductor digiti minimi
        
        O: medial and alteral tubercles of calcaneus tuberosity, plantar aponeurosis, intermuscular septa
        
        I: lateral side of base of proximal phalanx of 5th digit
        
        A: abduct and flexes little toe
        
        Innervation: lateral plantar nerve
    - - Quadratus plantae
        
        O: medial surface and lateral margin of plantar surface of calcaneus
        
        I: posterolateral margin of tendon of flexor digitorum longus
        
        A: assists flexor digitorum longus in flexing lateral 4 digits
        
        Innervation: lateral plantar nerve
      - Lumbricals
        
        O: tendons of FDL
        
        I: medial aspect of expansion over lateral 4 digits
        
        A: flex proximal phalanx, extend middle and distal phalanx of lateral 4 digits
        
        Innervation: #1 - medial plantar nerve; #2-4 - lateral plantar nerve
    - - Flexor hallucis brevis
        
        O: plantar surfaces of cuboid and lateral cuneiforms
        
        I: both sides of base of proximal phalanx of 1st digit
        
        A: flexes proximal phalanx of hallux
        
        Innervation: medial plantar nerve
      - Adductor hallucis oblique head
        
        O: bases of metatarsals 2-4
        
        I: lateral side of base of proximal phalanx of 1st digit
        
        A: adduct hallux, assists in transverse arch of foot by metatarsals medially
        
        Innervation: deep branch of lateral plantar nerve
      - Adductor hallucis transverse head
        
        O: plantar ligaments of metatarsophalangeal joints
        
        I: lateral side of base of proximal phalanx of 1st digit
        
        A: adduct hallux, assists in transverse arch of foot by metatarsals medially
        
        Innervation: deep branch of lateral plantar nerve
      - Flexor digiti minimi brevis
        
        O: base of 5th metatarsal
        
        I: base of proximal phalanx of 5th digit
        
        A: flexes proximal phalanx of 5th digit
        
        Innervation: superficial branch of lateral plantar nerve
    - - Plantar interossei
        
        O: plantar aspect of medial sides of shafts of metatarsals 3-5
        
        I: medial sides of bases of phalanges of 3-5th digit
        
        A: adducts digits 3-5 and flexes MTP joint
        
        Innervation: lateral plantar nerve
      - Dorsal interossei
        
        O: adjacent sides of shafts of metatarsals 1-5
        
        I: 1st - medial side of proximal phalanx of 2nd digit; 2-4th - lateral sides of 2-4 digit
        
        A: abducts digits 2-4 and flexes MTP joints
        
        Innervation: lateral plantar nerve
  - - - O: calcaneus, interosseous talocalcaneal ligament, stem of inferior extensor retinaculum
      - I: long extensor tendons of four medial digits
      - A: aids EDL in extending four medial toes at MTP and IP joints
      - Innervation: deep fibular nerve
    - - O: calcaneus, interosseous talocalcaneal ligament, stem of inferior extensor retinaculum
      - I: dorsal aspect of base of proximal phalanx of big toe
      - A: aids in EHL in extending big toe at MTP joint
      - Innervation: deep fibular nerve