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Flashcards in GRFC - O, I, N A Deck (84)
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1

Tibialis anterior

O: Tibial shaft (lateral aspect), interosseous membrane

I: Medial cuneiform, base of 1st metatarsal

N: Deep peroneal nerve (anterior compartment)

A: Dorsiflexion, inversion, supports medial longitudinal arch

2

Extensor digitorum longus

O: Shaft of fibula (anterior surface)
[shaft of tibia, interosseous membrane]

I: Extensor expansion of lateral four toes

N: Deep peroneal nerve (anterior compartment)

A: Dorsiflexion, toe extension

2

Peroneus tertius

O: Shaft of fibula (anterior surface)

I: Base of 5th metatarsal

N: Deep peroneal nerve (anterior compartment)

A: Dorsiflexion, eversion

3

Extensor digitorum brevis

O: Calcaneum

I: By four tendons into the proximal phalanx of big toe and long extensor tendons to 2nd, 3rd, and 4th toes

N: Deep peroneal nerve (anterior compartment)

A: Extends toes

4

Extensor hallucis longus

O: Shaft of fibula (anterior surface)

I: Base of distal phalanx of great toe

N: Deep peroneal nerve (anterior compartment)

A: Dorsiflexion, inversion

6

Peroneus brevis

O: Shaft of fibula (lateral surface)

I: Base of 5th metatarsal

N: Superficial peroneal nerve (lateral compartment)

A: Plantarflexion, eversion, supports lateral longitudinal arch

7

Peroneus longus

O: Shaft of fibula (lateral aspect)

I: Medial cuneiform, base of 1st metatarsal

N: Superficial peroneal nerve (lateral compartment)

A: Plantarflexion, eversion, supports lateral longitudinal arch and transverse arch

8

Gastrocnemius (lateral head)

O: Lateral condyle

I: Via tendo calcaneus into calcaneum (posterior surface)

N: Tibial nerve (posterior compartment)

A: Plantarflexion, knee flexion

9

Gastrocnemius (medial head)

O: Above medial condyle

I: Via tendo calcaneus into calcaneum (posterior surface)

N: Tibial nerve (posterior compartment)

A: Plantarflexion, knee flexion

10

Popliteus

O: Lateral condyle of femur (lateral surface)

I: Shaft of tibia (posterior) above soleal line

N: Tibial nerve (posterior compartment)

A: Knee flexion, unlocks knee joint (ER of femur on tibia), slackens ligaments of joint

11

Plantaris

O: Lateral supracondylar ridge of femur

I: Calcaneum (posterior surface)

N: Tibial nerve (posterior compartment)

A: Plantarflexion, knee flexion

12

Flexor digitorum longus

O: Shaft of tibia (posterior)

I: Bases of distal phalanges of lateral 4 toes

N: Tibial nerve (posterior compartment)

A: Toes flexion, plantarflexion, supports MLA and LLA

12

Flexor hallucis longus

O: Shaft of fibula (posterior)

I: Base of distal phalanx of big toe

N: Tibial nerve (posterior compartment)

A: Toe flexion, plantarflexion, supports MLA

13

Soleus

O: Shaft of tibia, shaft of fibula

I: Via tendo calcaneus into calcaneum (posterior surface)

N: Tibial nerve (posterior compartment)

A: Plantarflexion (powerful), provides main propulsive force in walking and running

14

Tibialis posterior

O: Shaft of tibia (posterior), shaft of fibula (posterior), inteosseous membrane

I: Navicular tuberosity and other neighboring bones

N: Tibial nerve

A: Plantarflexion, inversion, supports medial longitudinal arch

15

Abductor hallucis

Layer 1

O: Medial tuberosity of calcaneum, flexor retinaculum

I: Base of proximal phalanx of big toe

N: Medial plantar nerve

A: Flexion and abduction of big toe, braces MLA

15

Flexor digitorum brevis

Layer 1

O: Medial tuberosity of calcaneum

I: 4 tendons to 4 lateral toes inserted into borders of middle phalanges

N: Medial plantar nerve

A: Toe flexion, braces MLA and LLA

16

Quadratus plantae

Layer 2

O: Medial and lateral sides of calcaneum

I: Tendons of FDL

N: Lateral plantar nerve

A: Flexes 4 lateral toes (assists FDL)

16

Abductor digiti minimi

Layer 1

O: Medial and lateral tuberosities of calcaneum

I: Base of proximal phalanx of 5th toe

N: Lateral plantar nerve

A: Toe flexion and abduction, braces LLA

17

Lumbricals of the foot

Layer 2

O: Tendons of FDL (flexor digitorum longus)

I: Bases of lateral 4 proximal phalanges, dorsal extensor expansion

N: 1st - medial plantar nerve
Remainder - lateral plantar nerve

A: Extends toes at IP joints

18

Flexor hallucis brevis

Layer 3

O: Cuboid, lateral cuneiform, tibialis posterior insertion

I: Medial tendon to medial side of proximal phalanx of big toe; lateral tendon to lateral side of proximal phalanx of big toe

N: Medial plantar nerve

A: Big toe MTP flexion, supports MLA

19

Adductor hallucis (transverse head)

Layer 3

O: Plantar ligaments

I: Base of proximal phalanx of big toe (lateral side)

N: Lateral plantar nerve (deep branch)

A: Big toe MTP flexion, holds metatarsal bones

20

Adductor hallucis (oblique head)

Layer 3

O: Bases of 2nd, 3rd, and 4th metatarsals

I: Base of proximal phalanx of big toe (lateral side)

N: Lateral plantar nerve (deep branch)

A: Big toe MTP flexion, holds metatarsal bones

20

Flexor digiti minimi brevis

Layer 3

O: Base of 5th metatarsal

I: Base of proximal phalanx of big toe (lateral aspect)

N: Lateral plantar nerve

A: Little toe MTP joint flexion

21

Dorsal interossei of foot

O: Adjacent sides of metatarsal bones

I: Bases of proximal phalanges
1st - medial side of 2nd toe
Remainder - lateral sides of 2nd, 3rd, 4th toes
Dorsal extensor expansion

N: Lateral plantar nerve

A: Toe abduction, MCP flexion, IP extension

21

Plantar interossei

Layer 4

O: Inferior surfaces of 3rd, 4th, 5th metatarsals

I: Medial side of bases of phalanges of lateral 3 toes

N: Lateral plantar nerve

A: Toe adduction, MTP flexion, IP extension

22

Biceps femoris (short head)

O: Linea aspera

24

Biceps femoris (long head)

O: Ischial tuberosity

26

Tensor fascia lata

O: Iliac crest

27

Semitendinosus

O: Ischial tuberosity