Anterior and lateral leg compartments

Anterior compartment

As a group all of the muscles in this compartment contribute to ankle dorsiflexion

Deep fibular nerve

All muscles in the anterior compartment are innervated by what nerve

Superior extensor retinaculum, inferior extensor retinaculum

What are the 2 different retinaculums of the lower anterior compartment

Superior extensor retinaculum

Deep fascia thickening between fibular and tibia just proximal to the malleoli

Inferior extensor retinaculum

Y shaped thickening distal to the superior extensor retinaculum

Hold tendons in place and keep them from "bowstringing"

What are the purposes of the extensor retinaculums in the lower anterior compartment

Tibialis anterior, extensor hallucis longus, extensor digitorum longus, fibularis tertius

What are the muscles of the anterior compartment

Anterior tibial artery, dorsalis pedis

What are the vessels of the anterior compartment of the leg

Deep fibular nerve

What are the nerves in the anterior compartment

Common fibular nerve; superficial fibular nerve

Where does the deep fibular nerve come from and what is the other nerve it branches with

Fibular is longus, fibula, extensor digitorum longus

The deep fibular nerve arises between the _______ _______ and neck of _________ and passes through the _________ _______ _______ and descends on interossesus membrane and crosses distal end of tibia and enters dosrum of foot

Lateral surface of the fibula, and anterior and posterior intermuscular septa and the crural fascia (deep fascia of leg)

What are the compartment "walls" formed by in the lateral compartment

Crural fascia

What is the name of the deep fascia of the leg

Deep fibular nerve

Supplies dorsiflexor muscles of anterior compartment of leg, extensor muscles of dorsum of foot, and skin of first interstitial cleft; sends articular branches to joints it crosses

2; evertors of ankle/foot

How many muscles are in the lateral compartment of the leg and what actions do they perform

Superficial fibular nerve

What are the muscles of the lateral compartment innervated by

Fibularis longus, fibularis brevis

What are the muscles of the lateral compartment

Stabilizes the first ray against the ground during terminal stance through preswing phases of gait

What is an important function of the fibularis longus during gait

There are none

What are the vessels of the lateral compartment

Perforating branches from the anterior tibial artery

What supplies blood to the proximal lateral compartment of the leg

Peforating branches from the fibular artery

What supplies blood to the distal lateral compartment of the leg

Superficial fibular nerve

What are the nerves in the lateral compartment

Superficial fibular nerve

Similar to the superficial radial nerve in the arm, the ______ ______ ______ is going to leave the lateral compartment somewhere in the distal 1/3 compartment as a sensory nerve for distal third of anterior surface of leg and dorsum of foot

Motor innervation

Myotomes

The motor version of dermatomes

- ie. the motor contribution from the spinal nerve

Spinal nerve lesions

What are myotomes useful for testing for

L2 myotome

Iliopsoas

L3 myotome

Quadriceps

L4 myotomes

Tibialis anterior

L5 myotomes

Extensor hallucis

S1 myotomes

Gastrocnemius/soleus

S2 myotomes

Hamstrings