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PT Anatomy Unit 2 > Leg and Foot Muscles > Flashcards

Leg and Foot Muscles Flashcards

1
Q

Gastrocnemius

A

O: Medial Head–Posterior surface of distal femur just superior to medial condyle.
Lateral Head–Upper posterolateral surface of lateral femoral condyle.
I: Via calcaneal tendon, to posterior surface of calcaneus.

Tibial N.

Plantarflexes foot and flexes knee.

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2
Q

Plantaris

A

O: Inferior part of lateral supracondylar line of femur and oblique popliteal ligament of knee.
I: Via calcaneal tendon, to posterior surface of calcaneus.

Tibial N.

Plantarflexes foot and flexes knee.

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3
Q

Soleus

A

O: Soleal line and medial border of tibia; posterior aspect of fibular head and adjacent surfaces of neck and proximal shaft; tendinous arch between tibial and fibular attachments.
I: Via calcaneal tendon, to posterior surface of calcaneus.

Tibial N.

Plantarflexes the foot.

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4
Q

Popliteus

A

O: Lateral femoral condyle.
I: Posterior surface of proximal tibia

Tibial N

Stabilizes knee joint (resists lateral rotation of tibia on femur) Unlocks knee joint (laterally rotates femur on fixed tibia)

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5
Q

Flexor hallucis longus

A

O: Posterior surface of fibula and adjacent interosseous membrane.
I: Plantar surface of distal phalanx of great toe.

Tibial N.

Flexes great toe. (also plantarflexes)

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6
Q

Flexor digitorum longus

A

O: Medial side of posterior surface of the tibia
I: Plantar surface of bases of distal phalanges of the lateral four toes.

Tibial N.

Flexes lateral four toes.

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7
Q

Tibialis Posterior

A

O: Posterior surfaces of interosseous membrane and adjacent regions of tibia and fibula.
I: Tuberosity of navicular and adjacent region of medial cuneiform.

Tibial N.

Inversion and plantarflexion of foot; support of medial arch of foot during walking.

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8
Q

Fibularis Longus

A

O: Upper lateral surface of fibula, head of fibula, and occasionally the lateral tibial condyle.
I: Under surface of lateral sides of distal end of medial cuneiform and base of metatarsal I.

Superficial fibular N.

Eversion and plantarflexion of foot; supports arches of foot.

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9
Q

Fibularis brevis

A

O: Lower 2/3 of lateral surface of shaft of fibula.
I: Lateral tubercle at base of metatarsal V

Superficial fibular N.

Eversion of foot.

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10
Q

Tibialis anterior

A

O:Lateral surface of the tibia and adjacent interosseous membrane.
I: Medial and inferior surfaces of medial cuneiform and adjacent surfaces of base of metatarsal I.

Deep fibular N.

Dorsiflexion and inversion of foot; dynamic support of medial arch of foot.

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11
Q

Extensor hallucis longus

A

O: Middle 1/2 of medial surface of fibula and adjacent surface of interosseous membrane.
I: Dorsal surface of base of distal phalanx of great toe.

Deep fibular N.

Extension of great toe and dorsiflexion of foot.

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12
Q

Extensor digitorum brevis

A

O: Superolateral surface of the calcaneus
I: Lateral sides of the tendons of extensor digitorum longus of toes II to IV.

Deep fibular N.

Extension of toes II to IV.

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13
Q

Extensor hallucis brevis

A

O: Superolateral surface of he calcaneus
I: Base of proximal phalanx of great toe.

Deep fibular N.

Extension of MTP joint of great toe.

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14
Q

Abductor hallucis

A

O: Medial process of calcaneal tuberosity.
I: Medial side of base of proximal phalanx of great toe.

Medial planter nerve from the tibial nerve.

Abducts and flexes great toe at MTP joint.

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15
Q

Flexor digitorum brevis

A

O: Medial process of calcaneal tuberosity and plantar aponerosis.
I: Sides of plantar surface of middle phalanges of latera four toes.

Medial plantar nerve from the tibial nerve.

Flexes lateral four toes at PIP joint.

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16
Q

Abductor Digiti Minimi

A

O: Lateral and medial processes of calcaneal tuberosity, and band of connective tissue connecting calcaneus with base of metatarsal V.
I: Lateral side of base of proximal phalanx of little toe.

Lateral plantar nerve from the tibial nerve.

Abducts little toe at the MTP joint.

17
Q

Quadratus plantae

A

O: Medial surface of calcaneus and lateral process of calcaneal tuberosity.
I: Lateral side of tendon of flexor digitorum longus in proximal sole of the foot.

Lateral plantar nerve from the tibial nerve.

Assists flexor digitorum longus tendon in flexing toes II to V.

18
Q

Lumbricals

A

O: First lumbrical–medial side of tendon of flexor digitorum longus associated with toe II; second, third, and fourth lumbricals - adjacent surfaces of adjacent tendons of fleor digitorum longus.
I: Medial free margins of extensor hoods of toes II to V.

First lumbrical–medial plantar nerve from the tibial nerve.
Second, thrid, and fourth lumbricals–lateral plantar nerve from the tibial nerve.

Flexion of MTP joint and extension of IP joints.

19
Q

Flexor hallucis brevis

A

O: Plantar surface of cuboid and lateral cuneiform; tendon of tibialis posterior.
I: Lateral and medial sides of base of proximal phalanx of the great toe.

Medial planar nerve from the tibial n.

FLexes MTP joint of the great toe.

20
Q

Adductor hallucis

A

O:Transverse head–ligaments associated with MTP joints of lateral three toes.
Oblique head–bases of metatarsals II to IV and from sheath covering fibularis longus.
I: Lateral side of base of proximal phalanx of great toe.

Lateral plantar N from the tibial N.

Adducts great toe at MTP joint.

21
Q

Flexor digiti minimi brevis

A

O: Base of metatarsal V and related sheath of fibularis longus tendon.
I: Lateral side of base of proximal phalanx of little toe.

Lateral plantar nerve from the tibial N.

Flexes little toe at MTP joint.

22
Q

Dorsal Interossei

A

O: Sides of adjacent metatarsals
I: Extensor hoods and bases of proximal phalanges of toes II to IV.

Lateral plantar nerve from tibial n.; first and second dorsal interossei also innervated by deep fibular n.

Abduction of toes II to IV at MTP joints; resist extension of MTP joints and flexion of IP joints.

23
Q

Plantar Interossei

A

O: Medial sides of metatarsals of toes III to V
I: Extensor hoods and bases of proximal phalanages of toes III to V.

Lateral plantar N from tibial N.

Adduction of toes III to V at MTP joints; resist extension of the MTP joints and flexion of the IP joints.

24
Q

Extensor digitorum longus

A

O: proximal 1/2 of medial surface of fibula and related surface of lateral tibial condyle.
I: Via dorsal digital expansions into bases of distal and middle phalanges of lateral four toes.

Deep Fibular N.

Extension of lateral four toes and dorsiflexion of foot.

25
Q

Fibularis Tertius

A

O: Distal part of medial surface of fibula.
I: Dorsomedial surface of base of metatarsal V.

Deep Fibular nerve.

Dorsiflexion and eversion of foot.

PT Anatomy Unit 2 (4 decks)

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