Week 9: Foot/LE Joints & mm. Flashcards
Transverse ligament
Structure: extensor digitorum brevis
Origin: calcaneus (floor of tarsal sinus) interosseus talocalcaneal ligament, stem of interior extensor retinaculum
Insertion: long extensor tendons of four medial digits (toes 2-4)
Action:
helps ext. digitorum brevis extend 4 medial toes at the MTP and ITP joints
Anterior tibiofibular ligament
lateral collateral ligament
aka fibular collateral ligament
Pubofemoral Ligament
Iliofemoral Ligament
lateral collateral ligament (of ankle)
Arcuate popliteal ligament
Oblique popliteal ligament
long plantar ligament
Structure: Flexor digitorum brevis
Origin: medial tubercle of tuberosity of calcaneus, plantar aponeurosis, intermuscular septa
Insertion: both sides of middle phalanges of lateral four digits
Innervation: medial plantar nerve
Action: flexes lateral four digits
Structure: extensor hallucis brevis
Origin: calcaneus, (floor of tarsal sinus) interosseus talocalcaneal ligament, stem of inferior extensor retinaculum
Insertion: dorsal aspect of base of proximal phalanx of great toe
Action: helps the ext. hallucis longus to extend the great toe at the MTP joint
Medial Meniscus
Structure: Plantar interossei
Origin: plantar aspect of medial sides of shafts of metatarsals 3-5
Insertion: medial sides of bases of phalanges of 3-5th digits
Action: adducts digits 3-5
flexes metatarsophalangeal joints
Structure: Abductor hallucis
Origin: medial tubercle of tuberosity of calcaneus, flex, retinaculum, plantar aponeurosis
Insertion: Medial side of base of proximal phalanx of 1st digit
Innervation: Medial plantar nerve
Main action:
- abducts hallux (big toe)
- flexes hallux
Structure: quadratus plantae
Origin: medial surface and lateral margin of plantar surface of calcaneus
Insertion: posterolateral margin of tendon of flexor digitorum longus
Innervation: lateral plantar nerve
main action: assists flexor digitorum longus in flexing lateral four toes
posterior tibiofibular ligament
Ischiofemoral Ligament
medial collateral ligament
aka tibial collateral ligament
Structure:Add Hallucis (transverse head)
Origin: transverse head: plantar ligaments of metatarsophalangeal (MTP) joints
Insertion: tendons of both heads attach to lateral side of base of proximal phalanx of 1st digit
Innervation: deep branch of lateral plantar nerve
Main action:
- adducts 1st digit
- assist in transverse arch of foot by metatarsals medially
interosseous membrane
Structure: Flex. Digiti minimi brevis
Origin: Base of 5th metatarsal
Insertion: base of proximal phalanx of 5th digit
Innervation: Superficial branch of lateral plantar nerve
Action: Flexes proximal phalanx of 5th digit, thereby assisting w flexion
Structure: dorsal interossei
Origin: adjacent sides of shafts of metatarsals 1-5
Insertion: 1st: medial side of proximal phalanx if 2nd digit
2-4th: lateral sides of 2-4th digits
Action: Abducts digit 2-4 and flex metatarsophalangeal joints
Structure: lumbricals
Origin: tendons of flex. digitorum longus
Insertion: medial aspect of expansion over lateral four digits
Innervation: medial 1; medial plantar nerve, lateral 3; lateral plantar nerve
Action: flex proximal phalanges, extend middle and distal phalanges of lateral four digits
Structure: Abductor digiti minimi
Origin: medial and lateral tubercles of tuberosity of calcaneus, plantar aponeurosis, intermuscular septa
Insertion: lateral side of base of proximal phalanx of 5th digit
Innervation: lateral plantar nerve
Action: abducts and flexes little toe
Structure: Adductor hallucis (oblique head)
Origin: oblique head: bases of metatarsals 2-4
Insertion: tendons of both heads attach to lateral side of base of proximal phalanx of 1st digit
Innervation: deep branch of lateral plantar nerve
Main action: flexes proximal phalanx of 5th digit while assisting with its flexion
lateral meniscus
Posterior cruciate ligament
Ligamentum teres (ligament of the head of the femur)
Patellar Ligament
Coronary Ligament
(medial and lateral)
deltoid ligament
