Lower Extremity (Origins, Insertions, Nerve supply and Arteries) Flashcards
What is the Origin of Tibialis Anterior?
Lateral condyle and superior 1/2 of lateral surface of tibia and interosseous membrane
What is the insertion of Tibialis Anterior?
Medial and inferior surfaces of medial cuneiform and base of 1st metatarsal
What is the nerve supply Tibialis Anterior?
Deep Fibular
What is the artery supply of Tibialis Anterior?
Anterior Tibial
What is the action of Tibialis Anterior?
Dorsiflexion and inversion
What is the Origin of Extensor Digitorum Longus?
Lateral condyle of tibia and superior 3/4 of medial surface of fibula and interosseous membrane
What is the insertion of Extensor Digitorum Longus?
Middle and distal phalanges of later 4 digits
What is the nerve supply Extensor Digitorum Longus?
Deep Fibular
What is the artery supply of Extensor Digitorum Longus?
Anterior Tibial
What is the action of Extensor Digitorum Longus?
Extension of lateral 4 digits and dorsiflexion
What is the Origin of Fibularis Teritius?
Inferior 1/3 of anterior surface of fibula and interosseous membrane
What is the insertion of Fibularis Teritius?
Dorsum of base of 5thmetatarsal
What is the nerve supply Fibularis Teritius?
Deep Fibular
What is the artery supply of Fibularis Teritius?
Anterior Tibial
What is the action of Fibularis Teritius?
Dorsiflexion and aids in eversion
What is the Origin of Extensor Hallucis Longus?
Middle part of anterior surface of fibula and interosseous membrane
What is the insertion of Extensor Hallucis Longus?
Dorsal aspect of base o distal phalanx of great toe (hallux)
What is the nerve supply of Extensor Hallucis Longus?
Deep Fibular
What is the artery supply of Extensor Hallucis Longus?
Anterior Tibial
What is the action of Extensor Hallucis Longus?
Extension of great toe and dorsiflexion
What is the Origin of Fibularis Longus?
Head and superior 2/3 lateral surface of fibula
What is the insertion of Fibularis Longus?
Base of 1st metatarsal and medial cuneiform
What is the nerve supply of Fibularis Longus?
Superficial Fibular
What is the artery supply of Fibularis Longus?
Perforating branches of fibular and anterior Tibial arteries
What is the action of Fibularis Longus?
Eversion and weak plantar flexion
What is the Origin of Fibularis Brevis?
Inferior 2/3 of lateral surface of fibula
What is the insertion of Fibularis Brevis?
Dorsal surface of tuberosity on lateral side of base of 5th metatarsal
What is the nerve supply of Fibularis Brevis?
Superficial Fibular
What is the artery supply of Fibularis Brevis?
Perforating branches of fibular and anterior Tibial arteries
What is the action of Fibularis Brevis?
Eversion and weak plantar flexion
What is the Origins of Gastrocnemius?
Lateral Head - lateral aspect of lateral condyle of femur
Medial head - popliteal surface of femur; superior to medial condyle
What is the insertion of Gastrocnemius?
Posterior surface of calcaneus via calcaneal tendon
What is the nerve supply of Gastrocnemius?
Tibial
What is the artery supply of Gastrocnemius?
Popliteal
What is the action of Gastrocnemius?
Plantar flexion with extended knee
Raises heel during walking
Leg flexion
What is the Origins of Soleus?
Posterior aspect of head and superior 1/4 of posterior surface of fibula; soleal line, middle 1/3 of medial border of tibia
What is the insertion of Soleus?
Posterior surface of calcaneus via calcaneal tendon
What is the nerve supply of Soleus?
Tibial
What is the artery supply of Soleus?
Popliteal and posterior Tibial arteries
What is the action of Soleus?
Plantar flexion independent of position of knee
Steadies leg on foot
What is the Origins of Plantaris?
Inferior end of lateral supracondylar line of femur; oblique popliteal l.
What is the insertion of Plantaris?
Posterior surface of calcaneus via calcaneal tendon
What is the nerve supply of Plantaris?
Tibial
What is the artery supply of Plantaris?
Popliteal and posterior Tibial arteries
What is the action of Plantaris?
Weak plantarflexion
What is the Origins of Popliteus?
Lateral surface of lateral condyle of femur and lateral meniscus
What is the insertion of Popliteus?
Posterior surface of tibia, superior to soleal line
What is the nerve supply of Popliteus?
Tibial
What is the artery supply of Popliteus?
Popliteal
What is the action of Popliteus?
Weak flexion of leg
Unlocks knee by rotating femur 5 degrees on fixed tibia
Medially rotates tibia of unplanted limb
What is the Origins of Flexor Hallucis Longus?
Inferior 2/3 of posterior surface of fibula
Inferior part of Interosseous membrane
What is the insertion of Flexor Hallucis Longus?
Base of distal phalanx of great toe
What is the nerve supply of Flexor Hallucis Longus?
Tibial
What is the artery supply of Flexor Hallucis Longus?
Fibular
What is the action of Flexor Hallucis Longus?
Flexion of great toe at all joints
Weak plantarflexion
What is the Origins of Flexor Digitorum Longus?
Medial part of posterior surface of tibia inferior to soleal line
Broad tendon to fibula
What is the insertion of Flexor Digitorum Longus?
Base of distal phalanges of lateral 4 digits
What is the nerve supply of Flexor Digitorum Longus?
Tibial
What is the artery supply of Flexor Digitorum Longus?
Posterior Tibial
What is the action of Flexor Digitorum Longus?
Flexion of lateral 4 digits
Plantarflexion
What is the Origins of Tibialis Posterior?
Interosseous membrane
Posterior surface inferior to soleal line
Posterior surface of fibula
What is the insertion of Tibialis Posterior?
Tuberosity of navicular Cuneiform Cuboid Sustentaculum tali Bases of 2nd - 4th metatarsals
What is the nerve supply of Tibialis Posterior?
Tibial
What is the artery supply of Tibialis Posterior?
Posterior Tibial
What is the action of Tibialis Posterior?
Plantarflexion and inversion
What is the Origins of Abductor Hallucis?
Medial tubercle of tuberosity of calcaneus
Flexor Retinaculum
Plantar aponeurosis
What is the insertion of Abductor Hallucis?
Medial side of base of proximal phalanx of 1st digit
What is the nerve supply of Abductor Hallucis?
Medial Plantar
What is the artery supply of Abductor Hallucis?
Medial Plantar
What is the action of Abductor Hallucis?
Abduction and flexion of great toe (hallux)
What is the Origins of Flexor Digitorum Brevis?
Medial tubercle of tuberosity of calcaneus
Plantar aponeurosis
Intermuscular septa
What is the insertion of Flexor Digitorum Brevis?
Both sides of middle phalanges of lateral 4 digits
What is the nerve supply of Flexor Digitorum Brevis?
Medial Plantar
What is the artery supply of Flexor Digitorum Brevis?
Medial Plantar
What is the action of Flexor Digitorum Brevis?
Flexion of lateral 4 digits
What is the Origins of Abductor Digiti Minimi?
Medial and lateral tubercles of tuberosity of calcaneus
Plantar aponeurosis
Intermuscular Septa
What is the insertion of Abductor Digiti Minimi?
Lateral side of base of proximal phalanx of 5th digit
What is the nerve supply of Abductor Digiti Minimi?
Lateral Plantar
What is the artery supply of Abductor Digiti Minimi?
Lateral Plantar
What is the action of Abductor Digiti Minimi?
Abduction and flexion of 5th digit (little toe)
What is the Origins of Abductor Quadratus Plantae?
Medial surface and lateral margin of plantar surface of calcaneus
What is the insertion of Quadratus Plantae?
Posterolateral margin tendon of Flexor Digitorum Longus
What is the nerve supply of Quadratus Plantae?
Lateral Plantar
What is the artery supply of Quadratus Plantae?
Lateral Plantar
What is the action of Quadratus Plantae?
Assists Flexor Digitorum Longus in flexing lateral 4 digits
What is the Origins of Lumbricals (4)?
Individual tendons of Flexor Digitorum Longus
What is the insertion of Lumbricals (4)?
Medial aspect of expansion over lateral 4 digits
What is the nerve supply of Lumbricals (4)?
1st-Medial Plantar
2nd-4th-Lateral Plantar
What is the action of Lumbricals (4)?
Flexion of proximal phalanges
Extend middle and distal phalanges lateral 4 digits
What is the Origins of Flexor Hallucis Brevis?
Plantar surface of cuboid, intermediate and lateral cuneiforms
What is the insertion of Flexor Hallucis Brevis?
Both sides base of proximal phalanx of 1st digit
What is the nerve supply of Flexor Hallucis Brevis?
Medial Plantar
What is the action of Flexor Hallucis Brevis?
Flexion of proximal phalanx of 1st digit
What is the Origins of Adductor Hallucis?
Oblique Head - Base of 2nd to 4th Metatarsals
Transverse Head - Plantar ll. of metatarsalphalangeal joints
What is the insertion of Adductor Hallucis?
Lateral side base of the proximal phalanx of 1st digit