Muscles of the Lower Leg

Question 1

Tibialis Anterior

Answer 1

Origin: Lateral condyle of tibia
Insertion: Base of metatarsal 1, medial cuneiform
Action: Dorsiflexion, inversion of foot
Innervation: Deep peroneal nerve

Question 2

Extensor Digitorum Longus

Answer 2

Origin: Lateral condyle of tibia
Insertion: Distal phalanges of digits 2-5
Action: Extends digits 2-5, dorsiflexion of foot
Innervation: Deep peroneal nerve

Question 3

Extensor Hallucis Longus

Answer 3

Origin: Anterior surface of fibula
Insertion: Dorsal surface of digit 1 (great toe)
Action: Extension of digit 1, dorsiflexion of the foot
Innervation: Deep peroneal nerve

Question 4

Peroneus Brevis

Answer 4

Origin: Lateral, distal fibula
Insertion: Lateral side of 5th metatarsal
Action: Plantarflex and evert foot (pronate)
Innervation: Superficial peroneal nerve

Question 5

Peroneus Longus

Answer 5

Origin: Posterior surface of tibia, superior fibula
Insertion: Base of metatarsal 1
Action: Plantarflexion and evert foot (Pronate)
Innervation: Superficial peroneal nerve

Question 6

Gastrocnemius

Answer 6

Origin: Medial and lateral heads: Posterior surfaces of medial and lateral femoral condyles
Insertion: Posterior surface of calcaneus via Achilles tendon
Action: Plantarflexion of foot, knee flexion
Innervation: Tibial Nerve

Question 7

Soleus

Answer 7

Origin: posterior surface of fibula, medial region of posterior tibia
Insertion: Poster surface of calcaneus via achilles tendon
Action: Plantarflexion of the foot
Innervation: Tibial nerve

Question 8

Tibialis Posterior

Answer 8

Origin: Posterior surface of tibia, interosseous membrane, medial surface of fibula
Insertion: Navicular bone, cuneiforms (3), cuboid, and metatarsals 2-4
Action: Plantarflexion, inversion, and adduction of foot
Innervation: Tibial Nerve

Question 9

Flexor Digitorum Longus

Answer 9

Origin: Posterior surface of tibia
Insertion: Inferior surface of distal phalanges 2-5
Action: Flexion of digits 2-5, inversion, and plantarflexion of foot
Innervation: Deep peroneal nerve

Question 10

Flexor Hallucis Longus

Answer 10

Origin: Posterior Fibula
Insertion: Inferior surface of distal phalanx of digit 1
Action: Flexion of digit 1, inversion and plantarflexion of foot
Innervation: Tibial Nerve