Lower Leg Muscles

Question 1

Anterior Tibialis Origin and Insertion

Answer 1

Origin- Lateral condyle and proximal two-thirds or the lateral surface of the tibia
Insertion- Medial and plantar aspects of the medial cuneiform and the base of the the first metatarsel

Question 2

Anterior Tibialis Isolated and Integrated Functions

Answer 2

Isolated- Concentrically accelerates dorsiflexion and inversion
Integrated- Eccentrically decelerates plantarflexion and eversion, isometrically stabilizes the arch of the foot

Question 3

Posterior Tibialis Origin and Insertion

Answer 3

Origin- Proximal two thirds of the posterior surface of the tibia and fibula
Insertion- Every tarsal bone except the talus, plus the bases of the second through the fourth metatarsal bones. The main insertion is on the navicular tuberosity and the medial cuneiform bone

Question 4

Posterior Tibialis Isolated and Integrated Functions

Answer 4

Isolated- Concentrically accelerates plantarflexion and inversion of the foot
Integrated- Isometrically stabilizes the arch of the foot

Question 5

Soleus Origin and Insertion

Answer 5

Origin- Posterior surface of the fibular head and proximal one third of its shaft from the posterior side of the tibia
Insertion- Calcaneous via the Achilles tendon

Question 6

Soleus Isolated and Integrated Functions

Answer 6

Isolated- Concentrically accelerates plantarflexion

Integrated- Decelerates ankle dorsiflexion, isometrically stabilizes the foot and ankle complex

Question 7

Gastrocnemius Origin and Insertion

Answer 7

Origin- Posterior aspect of the lateral and medial femoral condyles
Insertion- calcaneous via the Achilles tendon

Question 8

Gastrocnemius Isolated and Integrated Functions

Answer 8

Isolated- Concentrically accelerates plantarflexion

Integrated- Decelerates ankle dorsiflexion, isometrically stabilizes the foot and ankle complex

Question 9

Peroneus Longus Origin and Insertion

Answer 9

Origin- Lateral condyle head of the tibia, head, and proximal two thirds of the lateral surface of the fibula
Insertion-Lateral surface of the medial cuneiform and the lateral side of the base of the first metatarsal

Question 10

Peroneus Longus Isolated and Integrated Functions

Answer 10

Isolated- Concentrically plantarflexes and everts foot

Integrated- Decelerates ankle dorsiflexion, isometrically stabilizes the foot and ankle complex