Lower Leg, Ankle and Foot Flashcards
What is the most frequently injured major joint in the body?
Ankle joint
What type of joint is the ankle?
Synovial hinge joint
How many axises does the ankle have?
One - uniaxial
What bones articulate in the ankle joint?
Fibula
Tibia
Talus
When is the malleolar grip strongest?
Dorsiflexion
What is the ankle joint unstable?
Plantar flexion
Where in the ankle joint is the capsule thin?
Anteriorly and posteriorly
What supports the ankle medially and laterally?
Strong collateral ligaments
What are the names of the ligaments in the ankle?
Medial (or deltoid) ligament
Lateral ligament
How many slips does the medial ligament in the ankle have?
3
What is the function of the medial ligament in the ankle?
Stabilises the joint during eversion
Describe the shape of the medial ligament of the ankle
Large, strong, triangular band
How many slips does the lateral ligament of the ankle have?
3
Which of the ligaments of the ankle is stronger?
Medial ligament
What ligament of the ankle is more commonly involved in ankle injuries?
Lateral ligament
What muscles cause dorsiflexion of the ankle?
Tibialis anterior
Extensor digitorum longus
Extensor hallucis longus
Peroneus [fibularis] tertius
What muscles cause plantar flexion?
Gastrocnemius
Soleus
Plantaris
Tibialis posterior
Flexor hallucis longus
Flexor digitorum longus
What movement do ankle strains tend to occur on?
Inversion
What is Pott fracture?
Dislocation of the ankle
What is footballer’s ankle?
Repeated strain on the anterior capsule
What is tarsal tunnel syndrome?
Tibial nerve compression deep to the flexor retinacula
What is the function of the foot?
Supporting the body in standing and progression
How is it moved?
It is levered forwards in walking, running and jumping
What are the categories of bone in the foot?
Tarsus
Metatarsus
Phalanges
At what joint does inversion and eversion of the foot occur?
Subtalar joint
Transverse tarsal joint
What muscles invert the foot?
Tibialis anterior
Tibialis posterior
What muscles evert the foot?
Fibularis longus
Fibularis brevis
What is the function of the arch of the foot?
Acts as a shock absorber
Distributes weight over the foot
Acts as a springboard whilst walking, running and jumping
What structures form the arch of the foot?
Bones
What happens to the arch with each ground contact?
Deforms
Where are the longitudinal arches?
The medial and lateral parts of the foot
Where is the transverse arch?
Runs from side to side
Which of the longitudinal arches is higher and more important than the other?
Medial longitudinal arch
What maintains the integrity of the arches?
Shape of the united bones Plantar aponeurosis Long and short plantar ligaments Spring ligament (calaneonavicular) Intrinsic muscles of the foot
What causes acquired flat feet?
Dysfunction of the tibilais posterior