Lateral leg and sole of the foot Flashcards
Draw the tibia bone labelling the lateral and medial epicondyle, articulatory surface and medial malleous
see notes
Label the fibula bone with the lateral malleolus
see notes
Draw the bones of the sole of the foot and label them
calcaneus, talus, cuboid, navicular, cuboid and cuneiform (medial, intermediate and lateral), metatarsals and phalanges
State the origin, insertion, innervation and action of fibularis longus
o = upper lateral fibula and head of fibula
i = undersurface of lateral sides of distal end of medial cuneiform
i = superficial fibular nerve L5,S1,S2
eversion and plantar flexion of the foot
State the origin, insertion, innervation and action of fibularis brevis
o = lower 2/3 of lateral surface fo shaft of fibula
i = lateral tubercle at base of MT5
superficial fibular nerve L5,S1,S2
eversion of the foo
What does the common fibular nerve branch into
superficial and deep fibular
What arteries supply the lateral leg
branches from the fibular artery from the posterior compartment
What does the deep fibular nerve supply
the anterior compartment
What does the superficial fibular nerve supply
the lateral compartment
What is the role of the plantar aponeuroses
supports longitudinal arch of the foot and protects deeper structures in the sole
What 3 muscles form the first layer of the sole of the foot
flexor digitorum brevis, abductor digiti minimi and abductor hallucis
State the origin, insertion, innervation and action of flexor digitorum brevis
o = medial process of calcaneal tuberosity and plantar aponeurosis
i = side of plantar surface of middle phalanges of lateral 4 toes
medial plantar S1,2,3
flex’s lateral 4 toes at PIP joints
State the origin, insertion, innervation and action of abductor digiti minimi
o = lateral and medial process of calcaneal tuberosity
i = lateral side of base of proximal phalanx of little toe
lateral plantar nerve (from tibial) S1,2,3
abducts little toe at MTP joint
State the origin, insertion, innervation and action of abductor hallucis
o = medial process of calcaneal tuberosity
i = medial side of base of proximal phalanx of great tow
medial plantar nerve (from tibial) S1,2,3
abducts and flexes get toe at MTP joint
What muscles make up layer 2 of the sole of the foot
flexor hallucis longus and flexor digitorum longus, lumbircals and quadratus plantae
State the origin, insertion, innervation and action of flexor hallucis longus
o = inferior and poster 2/3 of fibula
i = base of distal phalanx of great toe
tibial nerve S2,3
flexes great toe at MTP and IP and plantarflexes the ank;e
State the origin, insertion, innervation and action of flexor digitorum longus
o = posterior middle 1/3 of tibia
i = base of distal phalanges of lateral 4 digits
tibial nerve S2,3
flexes lateral 4 toes at MTP, DIP and PIP
plantar flexes ankle
State the origin, insertion, innervation and action of the lumbricals
o = first lumbrical = medial side of FDL
2n3,3rd,4th lumbricals = adjacent surfaces of adjacent tendons of FDL
i = medial free margins of extensor hoods of toes 2-5
first lumbrical = medial nplantar erve, others = latreral plantar nerve
flexes MTP joints and extends IP joints
State the origin, insertion, innervation and action of quadratus plantae
o = medial calcaneous and lateral calcaneous tuberosity
i = lateral side of FDL tendon
lateral plantar nerve (from tibial)
S1,2,3
assists FDL in flexing toes 2-5
What muscles make up the thirs layer of the sole of the foot
flexor digiti minimi, adductor hallucis, flexor hallucis brevis, plantar and dorsal interossei, tibialis posterior
State the origin, insertion, innervation and action of flexor digiti minimi
origin = base of MT5
and sheath of FL tendon
i = lateral side of base of
proximal phalanx of little toe
lateral plantar nerve S2,3
flexes little toe at MTP joint
State the origin, insertion, innervation and action of adductor hallucis
o = transverse head (ligaments associated with MTP joints of lateral 3 toes) and oblique head (bases of MT 2-5)
insertion = lateral side of base of proximal phalanx
of great toe
lateral plantar nerve from tibial nerve S2,3
adducts the great toe at MTP joint
State the origin, insertion, innervation and action of flexor hallucis brevis
o = surface of cuboid and lateral cuneiform and tendon of tibialis posterior
i = lateral and medial sides of base of proximal phalanx of great toe
medial plantar nerve S1,2
flexes MTP joints and extends
State the origin, insertion, innervation and action of tibialis posterior I
o = posterior surfaces of tibia and
fibula and IOM
i = navicular tuberosity and bases of 2,3 and 4th
MTs
tibial nerve
inverts foot, plantar flexion of the ankle
State the origin, insertion, innervation and action of the plantar interossei
plantar:
o = medial side of MT of toes 3-5
i = extensor hoods and bases of proximal phalanxes
of toes 3-5
lateral plantar nerve S2,3
adducts toes 3-5 at MTP joints, resist extension of MTP
joints and flexi on of IP joints
State the origin, insertion, innervation and action of the dorsal interossei
dorsal:
o = sides of adjacent MTs
i = extensor hoods and bases of proximal phalanxes of toes
2-4
lateral plantar nerve
first and second dorsal interossei
also innervated by deep fibular
nerve S2,3
abducts at MTP joints and
resist extension of MTP joint
and flexion of IP joint
Describe plantar aponeurosis
Thickening of deep fascia in the sole of the lot
* Firmly anchored to medial process of the calcaneal tuberosity and extends forward as a tick band of longitudinally arranged connective tissue fibres. The fibres diverges as they pass anteriorly and form digital bands which enter toes and connect with bones, ligaments and dermis of skin over lower
* Distal to metatarsophalaneal joints, the digital bands of plantar apponeurosis are interconnected by transverse fibres which form superficial transverse metatarsal. Ligaments
* Supports the longitudinal arch of the foot and protects deeper structures in the sole.
