wrist and hand muscles

Question 1

What is the primary action of the tibialis anterior muscle?

Answer 1

Dorsiflexion and inversion

The tibialis anterior is the largest muscle located within the anterior compartment of the leg.

Question 2

Which muscles are responsible for plantarflexion?

Answer 2

• Gastrocnemius
• Soleus
• Plantaris
• Posterior tibialis
• Flexor hallucis longus
• Flexor digitorum longus

These muscles work together to perform the action of plantarflexion.

Question 3

What is the largest muscle in the posterior compartment of the leg?

Answer 3

Triceps surae

The triceps surae is formed by the gastrocnemius and the soleus.

Question 4

Which muscle is responsible for eversion of the foot?

Answer 4

• Fibularis brevis
• Fibularis longus
• Fibularis tertius

These muscles are located in the lateral compartment of the leg.

Question 5

Fill in the blank: The gastrocnemius has two heads, known as the _______ and _______.

Answer 5

medial head, lateral head

Question 6

What is the origin of the gastrocnemius muscle?

Answer 6

• Medial head: posterior surface of medial femoral condyle
• Lateral head: posterior surface of lateral femoral condyle

The gastrocnemius inserts into the calcaneus via the Achilles tendon.

Question 7

What action does the soleus muscle perform?

Answer 7

Plantarflexion

The soleus originates from the proximal two-thirds of the posterior surface of the proximal fibula and tibia.

Question 8

What is the insertion point for the tibialis anterior?

Answer 8

Plantar surface of medial cuneiform and first metatarsal

The tibialis anterior originates from the upper two-thirds of the lateral surface of the tibia.

Question 9

True or False: The peroneus longus is larger and more superficial than the peroneus brevis.

Answer 9

True

Question 10

What are the actions of the peroneus longus?

Answer 10

• Eversion of foot
• Plantarflexion of ankle

The peroneus longus originates from the head and upper two-thirds of the lateral surface of the fibula.

Question 11

What is the origin of the peroneus brevis?

Answer 11

Lower two-thirds lateral fibula

The peroneus brevis inserts at the tubercle on the lateral base of the fifth metatarsal.

Question 12

Fill in the blank: The muscles intrinsic to the foot are located between the _______ and _______ bones.

Answer 12

tarsal, metatarsal