Lower Leg Muscles

Question 1

Gastrocnemius

Answer 1

Origin - Posterior Femur Proximal to Medial and Lateral Condyle
Insertion - Calcaneal Tuberosity to Achilles Tendon
Action - Plantarflexion of Ankle
Innervation - Tibial Nerve
Blood Supply - Medial and Lateral Sural Artery

Question 2

Soleus

Answer 2

Origin - Soleal Line, 1/3
Insertion - Calcaneus from Achilles tendon
Action - Plantarflexion of Ankle
Innervation - Tibial Nerve
Blood Supply - Popliteal Artery

Question 3

Plantaris

Answer 3

Origin - Lateral Femoral Epicondyle
Insertion - Posterior surface of Calcaneus
Action - Flex Toes, 2-5 Weak Plantarflexion
Innervation - Tibial Nerve
Blood Supply - Posterior Tibial Artery

Question 4

Flexor Digitorum Longus

Answer 4

Origin - Middle 1/3 Posterior Surface of Tibia
Insertion - Distal Phalanges of Lateral 4 toes
Action - Flex Toes 2-5, Weak Plantarflexion
Innervation - Tibial Nerve
Blood Supply - Posterior Tibial Artery

Question 5

Flexor Hallucis Longus

Answer 5

Origin - Middle 1/3 of Fibula
Insertion - Distal Phalange of Big Toe
Action - Flex 1st Distal Phalange
Innervation - Tibial Nerve
Blood Supply - Posterior Tibial Artery

Question 6

Tibialis Posterior

Answer 6

Origin - Proximal 2/3 Posterior Surface of Tibia
Insertion - Navicular, Cuneiforms, Cuboid
Action - Inversion
Innervation - Tibial Neve
Blood Supply - Posterior Tibial Artery

Question 7

Peroneus Longus

Answer 7

Origin - Proximal 2/3 of Lateral Fibula
Insertion - Base 1st Metatarsal
Action - Eversion of Ankle
Innervation - Superficial Peroneal Nerve
Blood Supply - Peroneal Nerve

Question 8

Peroneus Brevis

Answer 8

Origin - Distal 2/3 of Lateral Fibula
Insertion - Dorsal Surface of 5th metatarsal
Action - Eversion of Ankle
Innervation - Superficial Peroneal Nerve
Blood Supply - Tibial and Peroneal Artery

Question 9

Extensor Digitorum Longus

Answer 9

O- Lateral tibial condyle
I- Middle and distal phalanges lateral 4 toes
A- Extend digits 2-5
N- Deep fibular nerve
B- Anterior tibial artery

Question 10

Extensor Hallucis Longus

Answer 10

O- Middle ⅓ Anterior fibula
I- Distal phalanx of big toe
A- Extend Big toe
N- Deep fibular nerve
B- Anterior tibial artery

Question 11

Peroneus Tertius

Answer 11

O- Anterior surface of the Fibula
I- Dorsal Surface 5th metatarsal
A- Dorsiflex
N-Deep fibular nerve
B- Dorsalis Pedis Artery

Question 12

Tibialis Anterior

Answer 12

O: Lateral Condyle of Tibia
I: Base of 1st metatarsal
A: Dorsiflexion
N: Deep Fibular Nerve
B: Anterior Tibial Artery