Exam 4 Lower Leg and Foot Muscles Flashcards
the anterior compartment muscles
tibialis anterior, extensor digitorum longus, extensor hallucis longus, peroneus Tertius.
what nerve and artery supply the anterior compartment
the anterior tibial artery
deep peroneal nerve
Tibialis anterior
O: superior 2/3 lateral surface of tibia
I: medial cuneiform and base first metatarsal
N: deep peroneal
A: DF and INV
Extensor Digitorum Longus
O: superior 2/3 fibula
I: middle and distal phalanges of the lateral four toes
N: deep peroneal
A: DF and extension of the toes.
Extensor Hallucis Longus
O: middle 1/3 fibula
I: base of the distal phalanx of hallux
N: deep peroneal
A: DF and extension of hallux
Peroneus Tertius
O: distal end of fibula
I: base of the 5th metatarsal
N: deep peroneal
A: DF and EVE
Extensor Digitorum Brevis
DORSUM OF FOOT O: calcaneus I: long extensor tendons of digits 2-4 N: deep peroneal A: extension of digits 2-4
Extensor Hallucis Brevis
DORSUM O: calcaneus I: base proximal phalanx of hallux N: deep peroneal A: extension of the big toe
Lateral compartment muscles
peroneus longus and peroneus brevis
what is the arterial and nerve supply of the lateral compartment
peroneal artery and superficial peroneal nerve
Peroneus (Fibularis) Longus
O: superior 2/3 fibula
I: base first metatarsal and medial cuneiform
N: superficial peroneal
A: EVE and PF
Peroneus (Fibularis) Brevis
O: distal end of the fibula
I: base of the 5th metatarsal
N: superficial peroneal
A: EVE and PF
posterior compartment muscles
Gastroc Soleus Plantaris Flexor Digitorum Longus Flexor Hallucis Longus Tibialis Posterior Popliteus
Posterior compartment artery and nerve supply
posterior tibial artery, and tibial nerve
Gastroc
O: lateral head from lateral femur and medial head of femur
I: calcaneus
N: tibial nerve
A: PF and knee flexion
Soleus
O: posterior surface tibia and fibula
I: calcaneus
N: tibial nerve
A: PF
Plantaris
O: lateral condyle of femur
I: calcaneus
N: tibial nerve
A: PL and leg flexion
Flexor Digitorum Longus
O: tibia
I: distal phalanx of lateral four digits
N: tibial nerve
A: flexion of digits 2-5 and PF
Flexor Hallucis Longus
O: fibula
I: distal phalanx of big toe
N: tibial nerve
A: flexion of hallux and PF
Tibialis Posterior
O: tibia, fibula and interosseous membrane
I: navicular, cuboid, base 2-4 metatarsals
N: tibial nerve
A: INV and PF
Popliteus
O: upper end of tibia
I: lateral condyle of femur
N: tibial nerve
A: rotation of knee joint and knee flexion
First layer of the sole of the foot
abductor hallucis
flexor digitorum brevis
abductor digiti (minimi) quinti
Abductor Hallucis
O: medial calcaneus and plantar aponeurosis
I: proximal phalanx of hallux
N: medial plantar nerve
A: ABD and flex hallux at MTP joint
Flexor Digitorum brevis
O: medial calcaneus and planter aponeurosis
I: middle phalanx of lateral four toes
N: medial plantar nerve
A: flexes toes 2-5 at MTP and PIP joints
abductor digiti (minimi) quinti
O: lateral calcaneus and plantar aponeurosis
I: proximal phalanx of 5th digit
N: lateral plantar nerve
A: ABD and flex the little toe at MTP
Second layer
flexor digitorum longus tendon
flexor hallucis longus tendon
quadratus plantae
Lumbricals
Flexor Digitorum Longus Tendon
O: tibia
I: distal phalanx of lateral four digits
N: tibial nerve
A: flexion of digits 2-5 at MTP, PIP and DIP joints
Flexor Hallucis Longus Tendon
O: fibula
I: distal phalanx of big toe
N: tibial nerve
A: flexion of hallux at MTP and IP joint
Quadratus Plantae
O: plantar surface of calcaneus
I: tendon of flexor digitorum longus
N: lateral plantar nerve
A: redirect line of pull of tendons of flexor digitorum longus
Lumbricals
O: medial border of tendons of the FDL
I: bases of proximal phalanx 2-5 and dorsal digital expansions
N: the medial one by the medial plantar and the lateral three by the lateral plantar
A: flexes the MTP and extends the PIP and DIP of the lateral 4 toes
Third Layer
Flexor Hallucis Brevis
Flexor Digiti Quinti
Adductor Hallucis
Flexor Hallucis Brevis
HAS SEASOMOIDS
O: plantar surface of the cuboid and lateral cuneiform
I: medial and lateral proximal phalanx of the big toe
N: medial plantar
A: flexes the great toe
Flexor Digiti Quinti
O: base of 5th metatarsal
I: proximal phalanx of the 5th toe
N: lateral plantar nerve
A: flex the little toe
Adductor Hallucis
O: Oblique head: base of 2-4 metatarsals
Transverse head: plantar lig. of the lateral 4 MTP
I: lateral base of the proximal phalanx of hallux
N: lateral plantar nerve
A: ADD the great toe, and maintaining transverse arch
Fourth layer of sole of foot
Plantar interossei
Dorsal Interossei
Plantar Interossei
O: medial side 3-5 metatarsals
I: medial sides of proximal phalanges 3-5 digits and extensor expansions
N: lateral plantar nerve
A: ADD to the line of the second toe
Dorsal Interossei
O: adjacent sides of two metatarsals I: #1: medial side of the second digit #2 lateral side of second digit #3 lateral side of 3rd digit #4 lateral side of 4th digit N: lateral plantar nerve A: ABD from line of the second toe
