12 - The Leg - I Flashcards
What type of joint is the ankle?
A synovial joint.
What movement is dorsiflexion?
Moving the ankle so the toes are pointing upwards.
What movement is plantarflexion?
Moving the ankle so the toes are pointing downwards.
What is inversion?
Medial rotation of the foot, too much inversion of the ankle could lead to a break or sprain.
What is eversion?
Lateral rotation of the ankle.
What position is the ankle the weakest in?
Plantarflexion.
How many muscles are in the anterior compartment of the leg?
3
What is the function of the muscles in the anterior compartment of the leg?
Dorsiflexion and extension of the toes.
What joints do the extension of the toes happen at?
Interphalangeal and metacarpal joint.
Tibialis Anterior (articulation/ what does it do)
- Originates firm the lateral surface of the tibia and attaches to the medial cuneate and the base of metacarpal 1.
- Dorsiflexes the foot also inverts the foot.
Extensor Digitorum longus (articulation/ what does it do)
- Originates form the lateral tibial condyle and the medial surface of the fibula, it splits into 4 and each tendon inserts onto a toe.
- It extends the lateral 4 toes and dorsiflexes the foot.
Extensor Hallucis Longus (articulation/ what does it do)
- Originates from the medial surface of the fibular shaft and converges into a tendon to insert onto the big toe.
- It extends the big toes and dorsiflexes the foot.
What innervates the muscles in the anterior compartment?
The deep fibula nerve, which is a branch of the common fibular nerve.
What vessel supplies blood to the anterior compartment?
The anterior tibial artery.
What is the function of the muscles in the lateral compartment?
Eversion and weak plantar flexion.