myology leg and foot

Question 1

Tibialis Anterior [O,I,A,Innvervation, Compartment]

Answer 1

O-Lateral condyle, body of tibia, interosseous membrane(fibrous tissue sheet that holds shafts of tibia and fibula together).
I-Metatarsal I and first (medial) cuneiform
A-Dorsiflexes foot at ankle joint and inverts (supinates) foot at intertarsal joints)
Innervation- Deep Fibular (peroneal) nerve
Anterior compartment

Question 2

Extensor hallucis longus [O,I,A,innervation,C]

Answer 2

O-Anterior surface of fibula and interosseous membrane
I-distal phalanx of great toe
A-Dorsiflexes foot at ankle joint and extends proximal phalanx of great toe at metatarsophalangeal joint
Innervation- Deep Fibular (peroneal) nerve
Anterior compartment

Question 3

Extensor digitorum longus[O,I,A,innervation,C]

Answer 3

O-Lateral condyle of tibia, anterior surface of fibula, and IM
I-Middle and distal phalanges of toes II-V
A-Dorsiflexes foot at ankle joint and extends distal and middle phalanges of each toe at interphalangeal joints and proximal phalanx of each toe at metatarsophalangeal joint
Innervation- Deep Fibular (peroneal) nerve
Anterior compartment

Question 4

Fibularis (Peroneus) tertius[O,I,A,innervation,C]

Answer 4

O-Distal third of fibula and interosseous membrane
I-Base of metatarsal V
A-Dorsiflexes foot at ankle joint and everts (pronates) foot at intertarsal joints.
Innervation- Deep Fibular (peroneal) nerve
Anterior compartment

Question 5

Fibularis (Peroneus) longus

[O,I,A,innervation,C]

Answer 5

O-Head and body of fibula
I-Metatarsal I and first cuneiform
A-Plantar flexes foot at ankle joint and everts (pronates) foot at intertarsal joints
Innervation-Superficial fibular (peroneal) nerve
C-LATERAL (FIBULAR) COMPARTMENT

Question 6

Fibularis (Peroneus) brevis

[O,I,A,innervation,C]

Answer 6

O-body of fibula
I-Base of metatarsal V
A-Plantar flexes foot at ankle joint and everts (pronates) foot at intertarsal joints
Innervation-Superficial fibular (peroneal) nerve
C-LATERAL (FIBULAR) COMPARTMENT

Question 7

Gastrocnemius

[O,I,A,innervation,C]

Answer 7

O-Lateral and medial condyles of femur and capsule of knee
I-Calcaneus by way of calcaneal (Achilles) tendon
A-Plantar flexes foot at ankle joint and flexes leg at knee joint
Innervation-Tibial Nerve
C-Superficial posterior compartment

Question 8

Soleus

[O,I,A,innervation,C]

Answer 8

O-Head of fibula and medial border of tibia
I-Calcaneus by way of calcaneal (Achilles) tendon
A-Plantar flexes foot at ankle joint
Innervation-Tibial Nerve
C-Superficial posterior compartment compartment

Question 9

Plantaris

[O,I,A,innervation,C]

Answer 9

O-Femur superior to lateral condyle
I-Calcaneus by way of calcaneal (Achilles) tendon
A-Plantar flexes foot at ankle joint and flexes leg at knee joint
Innervation-Tibial Nerve
C-Superficial posterior compartment

Question 10

Popliteus

[O,I,A,innervation,C]

Answer 10

O-Lateral condyle of femur
I-Proximal tibia
A-Flexes leg at knee joint and medially rotates tibia to unlock the extended knee
Innervation-Tibial Nerve
C-Deep posterior compartment

Question 11

Tibialis posterior

[O,I,A,innervation,C]

Answer 11

O-Tibia, fibula, and interosseous membrane
I-Metatarsals II-V;navicular, all three cuneiforms; and cuboid
A-Plantar flexes foot at ankle joint and inverts (supinates) foot at intertarsal joints
Innervation-Tibial Nerve
C-Deep posterior compartment

Question 12

Flexor digitorum longus

[O,I,A,innervation,C]

Answer 12

O-posterior surface of tibia
I- Distal phalanges of toes II-V
A-Plantar flexes foot at ankle joint; flexes distal and middle phalanges of each toe at interphalangeal joints and proximal phalanx of each toe at metatarsophalangeal joint
Innervation-Tibial Nerve
C-Deep posterior compartment and 2nd layer of Plantar muscles (extrinsic)

Question 13

Flexor Hallucis longus

[O,I,A,innervation,C]

Answer 13

O-inferior two-thirds of fibula
I-Distal phalanx of great toe
A-Plantar flexes foot at ankle joint;flexes distal phalanx of great toe at interphalangeal joint and proximal phalanx of great toe at metatarsophalangeal joint
Innervation-Tibial Nerve
C-Deep posterior compartment and 2nd layer of Plantar muscles (extrinsic)

Question 14

Extensor hallucis brevis

[O,I,A,innervation,C]

Answer 14

O-Calcaneus and inferior extensor retinaculum
I-Proximal phalanx of great toe
A-extends great toe at metatarsophalangeal joint
Innervation-deep fibular (peroneal) nerve
C-dorsal foot

Question 15

Extensor digitorum brevis

[O,I,A,innervation,C]

Answer 15

O-Calcaneus and inferior extensor retinaculum
I-Middle phalanges of toes II-IV
A-Extends toes II-IV at interphalangeal joints
Innervation-deep fibular (peroneal) nerve
C-dorsal foot

Question 16

Flexor hallucis brevis

[O,I,A,innervation,C]

Answer 16

O-Cuboid and third (lateral) cuneiform
I-Medial and lateral sides of proximal phalanx of great toe via a tendon containing a sesamoid bone
A-Flexes great toe at metatarsophalangeal joint
Innervation-Medial Plantar nerve
C-third layer

Question 17

Lumbricals

[O,I,A,innervation,C]

Answer 17

O-Tendons of flexor digitorum longus
I-tendons of extensor digitorum longus on proximal phalanges of toes II-V
A-Extend toes II-V at interphalangeal joints and flex toes II-IV at metatarsophalangeal joints
innervation-Medial and lateral plantar nerves
C-2nd layer

Question 18

Plantar Interossei

[O,I,A,innervation,C]

Answer 18

O-metatarsals III-V
I-medial side of proximal phalanges of toes III-V
A- adduct and flex proximal metatarsophalangeal joints and extend toes at interphalangeal joints
Innervation-Lateral plantar nerve
C-Fourth layer )Deepest