Lateral Leg Compartment Anatomy, Origins, Insertions, & More

The video tutorial provides an in-depth look at the lateral compartment of the leg, focusing on the two main muscles: fibularis longus and fibularis brevis. It covers their origins, insertions, and pathways, highlighting the role of the peroneal retinacula. The tutorial explains the functions of these muscles in eversion and plantar flexion, and details their innervation by the superficial peroneal nerve and blood supply from the fibular artery. It also clarifies the distinction between the lateral compartment and the anterior compartment, particularly regarding the fibularis tertius muscle.

Which two muscles are found in the lateral compartment of the leg?

• Tibialis anterior and extensor digitorum longus

• Peroneus longus and peroneus brevis

• Gastrocnemius and soleus

• Flexor hallucis longus and flexor digitorum longus

What is the insertion point of the fibularis brevis muscle?

• Calcaneus

• Base of the 5th metatarsal

• Medial cuneiform

• Base of the 1st metatarsal

How does the fibularis longus tendon reach its insertion point?

• It inserts directly into the calcaneus

• It travels along the medial side of the leg

• It loops underneath the plantar surface of the foot

• It passes over the top of the foot

What is the primary function of the fibularis muscles?

• Flexion of the toes

• Dorsiflexion of the foot

• Inversion of the foot

• Eversion of the foot

Which nerve innervates the lateral compartment of the leg?

• Deep peroneal nerve

• Superficial peroneal nerve

• Tibial nerve

• Sural nerve

Which artery supplies blood to the lateral compartment muscles?

• Posterior tibial artery

• Anterior tibial artery

• Popliteal artery

• Fibular artery

Which muscle is not part of the lateral compartment despite its name?

• Peroneus longus

• Fibularis longus

• Peroneus brevis

• Peroneus tertius