Anterior Leg Flashcards
Muscles in the anterior compartment usually do what?
- Extend
2. Dorsiflex
Muscles in the posterior column usually do what?
- Flex
2. Plantarflex
What are the muscles in the anterior compartment?
From medial to lateral
- Tibialis anterior m
- Extensor hallucis longus m.
- Extensor digitorum longus m.
- Fibularis tertius m.
- Tibialis Anterior M
I:
BS:
I: Deep fibular N.
BS: Anterior tibial A.
- Tibialis Anterior M
Action:
- Dorsiflex
2. Inversion
- Extensor Hallucis Longus M
I:
BS:
I: Deep fibular N.
BS: Anterior tibial A
- Extensor Hallucis Longus M
Action
- Extend hallux (big toe)
2. Dorsiflex
- Extensor Digitorum Longus M
I:
BS:
I: Deep fibular n.
BS: Anterior tibial a.
- Extensor Digitorum Longus M
Action:
- Extends the lateral 4 digits
2. Dorsiflex
- Fibularis Tertius M
I:
BS:
I: Deep fibular n
BS: Anterior tibial a.
- Fibularis Tertius M
Action:
- Dorsiflex
2. Eversion
Where does the tibialis anterior m attach?
medial surface of the medial cuneiform and first metatarsal base
What do the tendons of the extensor digitorum longus m form?
the 4 tendons form an extensor expansion over the dorsum of lateral 4 proximal phalanges that divide into 2 lateral slips (distal phalanx) & one central slip (middle phalanx
The fibularis teritius m fuses with what?
Extensor digitorum longus and the tendon does NOT attach to a digit.
Deep fibular N also innervates what?
- Extensor hallucis brevis m
2. Extensor digitorum brevis m
