Q8-1a. Anterior Compartment Conference Flashcards
list the three borders of the tibia,
which are palpable
- anterior border (palpable)
- interosseous/lateral border
- medial border (palpable)
The anterior osteofascial compartment is found between what two borders of the tibia?
Anterior & Interosseous/Lateral Borders
You make an anterior incision parallel to the anterior border of the tibia.
Which dermatome did you cut?
L4/L5 dermatome
which nerve supply the L5 dermatome?
- lateral sural cutaneous nerve;
- & superficial fibular
which nerve supply the L4 dermatome?
saphenous nerve
with an anterior incision parallel to the anterior border of the tibia (about 1 cm lateral to anterior border) –>
by widening the incision MEDIALLY, which structures will be running through the superficial fascia?
- great saphenous vein
- saphenous nerve
with an anterior incision parallel to the anterior border of the tibia (about 1 cm lateral to anterior border) –>
by widening the incision LATERALLY, which structures will be running through the superficial fascia?
crural fascia overlying tibialis anterior
anterior osteofascial compartment:
contents
- muscles
- tibialis anterior
- EHL (extensor hallucis longus)
- EDL (extensor digitorum longus)
- Fibularis tertius
- anterior tibial artery & veins
- deep fibular nerve
motor innervation to muscles of anterior compartment
deep fibular nerve
main blood supply to muscles of anterior compartment?
anterior tibial artery
common function of muscles of anterior compartment
ankle dorsiflexion
when are the anterior compartment muscles ESPECIALLY active during the gait cycle?
- HEEL CONTACT/heel strike/initial contact
- decelerate the foot so it touches down on the ground in a controlled manner
- SWING PHASE
- keeps the foot from dragging on the ground
tibialis anterior: main origins
- Crural fascia
- Interosseous membrane
- Lateral tibial condyle
- Superior half of lateral surface of tibia
tibialis anterior: insertion
•Medial-plantar surfaces of both the medial cuneiform & MT 1 base
tibialis anterior: major actions
dorsiflexes the ankle;
inverts the foot
what retinacula does the Tibialis anterior and EHL muscles pass deep to?
- superior extensor and
- inferior extensor
(both arms)