Muscles of the Leg

Question 1

Name the Muscles of the Anterior Compartment

Tom’s Harry Dick is the Smallest

Answer 1

Tibialis Anterior
Extensor Digitorum Longus
Extensor Hallucis Longus
Fibularis Tertius

Question 2

Tibialis Anterior - Origin

Answer 2

Lateral Condyle and Proximal Lateral surface of the Tibia

Interosseous membrane

Question 3

Tibialis Anterior - Insertion

Answer 3

Medial cuneiform and base of 1st metatarsal

Question 4

Tibialis Anterior - Innervation

Answer 4

DEEP FIBULAR NERVE

Question 5

Tibialis Anterior - Action(s)

Answer 5

Dorsiflex ankle

Invert Foot

Question 6

Extensor Digitorum Longus - Origin

Answer 6

Lateral Condyle of tibia
Proximal fibula
Interosseous membrane

Question 7

Extensor Digitorum Longus - Insertion

Answer 7

Middle and distal phalanges of lateral four digits (digits 2-5)

Question 8

Extensor Digitorum Longus - Innervation

Answer 8

DEEP FIBULAR NERVE

Question 9

Extensor Digitorum Longus - Action(s)

Answer 9

Extends lateral four digits (2-5)

Dorsiflexes ankle

Question 10

Extensor Hallucis Longus - Origin

Answer 10

Anterior surface of fibula

Interosseous membrane

Question 11

Extensor Hallucis Longus - Insertion

Answer 11

Base of distal phalanx of great (big) toe

Question 12

Extensor Hallucis Longus - Innervation

Answer 12

DEEP FIBULAR NERVE

Question 13

Extensor Hallucis Longus - Action(s)

Answer 13

Extends big toe

Dosiflexes ankle

Question 14

Fibularis Tertius - Origin

Answer 14

Anterior, distal fibula

Interosseous membrane

Question 15

Fibularis Tertius - Insertion

Answer 15

Base of 5th metatarsal

Question 16

Fibularis Tertius - Innervation

Answer 16

DEEP FIBULAR NERVE

Question 17

Fibularis Tertius - Action(s)

Answer 17

Dorsiflexes ankle

EXCEPTION Aids in EVERSION of the foot

Question 18

Name the Muscles of the Lateral compartment of the Leg

Answer 18

Fibularis Longus

Fibularis Brevis

Question 19

Fibularis Longus - Origin

Answer 19

Head and proximal, lateral surface of FIBULA

Question 20

Fibularis Longus - Insertion

Answer 20

Base of 1st metatarsal and medial cuneiform (similar to tibialis anterior)

Question 21

Fibularis Longus - Innervation

Answer 21

Superficial Fibular Nerve

Question 22

Fibularis Longus - Action(s)

Answer 22

Everts foot

Weakly Plantarflexes

Question 23

Fibularis Brevis - Origin

Answer 23

Middle, lateral surface of FIBULA

Question 24

Fibularis Brevis - Insertion

Answer 24

Base of 5th Metatarsal (similar to fibularis tertium)

Question 25

Fibularis Brevis - Innervation

Answer 25

Superficial Fibular Nerve

Question 26

Fibularis Brevis - Action(s)

Answer 26

Everts foot | Weakly plantarflexes

Question 27

Name the Muscles of the SUPERFICIAL Posterior Compartment of the Leg

Answer 27

Gastrocnemius Soleus Plantaris

Question 28

What is the name of the fascia that separates the superficial and deep compartments of the posterior leg?

Answer 28

Transverse intermuscular septa

Question 29

Gastrocnemius - Origin

Answer 29

LATERAL HEAD - lateral aspect of the lateral femoral condyle | MEDIAL HEAD - popliteal surface of femur superior to medial condyle

Question 30

Gastrocnemius - Insertion

Answer 30

Posterior Calcaneus via calcaneal tendon

Question 31

Gastrocnemius - Innervation

Answer 31

Tibial Nerve

Question 32

Gastrocnemius - Action(s)

Answer 32

Plantarflexes ankle when knee is extended Raises heel when walking Flexes leg at knee joint **EXCEPTION**

Question 33

Soleus - Origin

Answer 33

Posterior head of fibula | Soleal line of tibia

Question 34

Soleus - Insertion

Answer 34

Posterior calcaneus via calcaneal tendon

Question 35

Soleus - Innervation

Answer 35

Tibial Nerve

Question 36

Soleus - Action(s)

Answer 36

Plantarflexes ankle

Question 37

Plantaris - Origin

Answer 37

Lateral supracondylar line of femur

Question 38

Plantaris - Insertion

Answer 38

Posterior calcaneus via calcaneal tendon

Question 39

Plantaris - Innervation

Answer 39

Tibial Nerve

Question 40

Plantaris - Action(s)

Answer 40

Weakly assists gastrocnemius in plantarflexing ankle

Question 41

Name the Muscles of the DEEP Posterior Compartment of the Leg

Answer 41

Popliteus Tibialis Posterior Flexor Digitorum Longus Flexor Hallucis Longus

Question 42

Popliteus - Origin

Answer 42

Lateral femoral condyle | Lateral Meniscus

Question 43

Popliteus - Insertion

Answer 43

Posterior tibia superior to soleal line

Question 44

Popliteus - Innervation

Answer 44

Tibial Nerve

Question 45

Popliteus - Action(s)

Answer 45

Laterally rotates femur on fixed tibia OR Medially rotates tibia of unfixed limb The unlocking muscle of the knee

Question 46

Tibialis Posterior - Origin

Answer 46

Posterior tibia, fibula and interosseous membrane

Question 47

Tibialis Posterior - Insertion

Answer 47

Primarily to tuberosity of navicular

Question 48

Tibialis Posterior - Innervation

Answer 48

Tibial Nerve

Question 49

Tibialis Posterior - Action(s)

Answer 49

Inverts foot | Plantarflexes ankle

Question 50

Flexor Digitorum Longus - Origin

Answer 50

Posterior tibia and fibula

Question 51

Flexor Digitorum Longus - Insertion

Answer 51

Bases of distal phalanges of lateral four digits

Question 52

Flexor Digitorum Longus - Innervation

Answer 52

Tibial Nerve

Question 53

Flexor Digitorum Longus - Action(s)

Answer 53

Flexes lateral four digits | Plantarflexes ankle

Question 54

Flexor Hallucis Longus - Origin

Answer 54

Inferior, posterior fibula and interosseous membrane

Question 55

Flexor Hallucis Longus - Insertion

Answer 55

Base of distal phalanyx of great toe

Question 56

Flexor Hallucis Longus - Innervation

Answer 56

Tibial nerve

Question 57

Flexor Hallucis Longus - Action(s)

Answer 57

Flexes great toe | Weakly Plantarflexes ankle