Ankle & Foot Flashcards
The talocrural joint forms the __________ __________ which allows for what movements?
ankle mortise, dorsiflexion & plantarflexion
What muscles assist with ankle plantarflexion?
- gastrocnemius
- soleus
- tibialis posterior
- plantaris
- fibularis longus & brevis
What nerve innervates the posterior compartment of the lower leg?
Tibial n.
What muscles assist with ankle dorsiflexion?
- tibialis anterior
-extensor digitorum longus - extensor hallucis longus
- fibularis tertius
What muscles assist with ankle inversion?
- tibialis posterior
- flexor digitorum longus
- flexor hallucis longus
- tibialis anterior
What muscles assist with ankle eversion?
- fibularis longus, brevis & tertius
- extensor digitorum longus
What nerve innervates the lateral compartment of the lower leg?
superficial fibular N
What nerve innervates the anterior compartment of the lower leg?
deep fibular N
Which is convex and concave in the talocrural joint?
convex = talus
concave = tibia
Describe the roll & glide during open-chain ankle dorsiflexion.
anterior roll, posterior glide
Describe the roll & glide during open-chain ankle plantarflexion.
posterior roll, anterior glide
Describe the roll & glide during closed-chain ankle dorsiflexion.
anterior roll, anterior glide
What movements at the ankle occur in the sagittal plane?
plantarflexion & dorsiflexion
What deformities can occur at the ankle that affect movements in the sagittal plane?
pes equinus & pes calcaneus
Pes equinus
foot is held in plantarflexion
Pec calcaneus
foot is held in dorsiflexion
Which movements at the ankle occur in the frontal plane?
inversion & eversion
What deformities can occur at the ankle that affect movements that occur in the frontal plane?
varus & valgus
Varus (ankle)
foot held in inversion
Valgus (ankle)
foot held in eversion
What movements occur at the ankle in the transverse plane?
abduction & adduction
What deformities can occur at the ankle that affect movements in the transverse plane?
abductus & adductus
Abductus (ankle)
foot held in abducted position
Adductus
foot held in adducted position
What triplanar movements occur with closed-kinetic chain supination?
abduction
inversion
dorsiflexion
What triplanar movements occur with open-chain supination?
adduction
inversion
plantarflexion
What deformity can occur that affects triplanar movement in CKC supination?
pes cavus
What is a pes cavus foot? What movement does it cause difficulty with?
high arch
difficulty w/pronation
What triplanar movements occur with CKC pronation?
adduction
eversion
plantarflexion
What triplanar movements occur with open-chain pronation?
abduction
eversion
dorsiflexion
What deformity can occur that affects triplanar movement in CKC pronation?
pes planus
What is a pes planus foot? What movement does it cause difficulty with?
flat foot
difficulty w/supination
What movement do the deltoid ligaments of the ankle limit?
eversion
What movement do the lateral ligaments of the ankle limit?
eversion
What are the lateral ligaments of the ankle?
anterior talofibular
posterior talofibular
calcaneofibular
Which ligaments are usually involved with a low ankle sprain?
deltoid, anterior talofibular, calcaneofibular
What ligaments are usually involved with a high ankle sprain?
anterior & posterior talofibular
What are the key ligaments of the foot?
long plantar & spring ligament
Long plantar ligament - where does it run? what does it do?
extends from the calcaneus to the cuboid and lateral metatarsals
provides structural stability to lateral side of foot
Spring ligament - where does it run? what does it do?
calcaneus to navicular bones
supports medial longitudinal arch
What is the function of the medial longitudinal ligament?
load bearing & shock absorbing
What is the function of the plantar fascia?
provides passive support to medial longitudinal ligament
What is the transverse arch formed by?
cuneiforms & cuboid
A front squat requires more ankle ______________________.
dorsiflexion
What individuals benefit from using a front squat? Why?
individuals w/back pain
shorter moment arm on back = less torque
What individuals benefit from using a low bar back squat? Why?
individuals w/bad knees or w/longer femurs
shorter moment arm on knees = less torque