Ch 4 - MSK: Ankle and Foot Flashcards
What is the most commonly injured ankle ligament?
Anterior talofibular ligament (ATFL)
What is the primary lateral ankle ligament stabilizer?
Anterior talofibular ligament (ATFL)
What are the lateral ankle ligaments?
– Anterior talofibular ligament (ATFL)
– Calcaneofibular ligament (CFL)
– Posterior talofibular ligament (PTFL)
What are the deep components of the deltoid ligament?
■ Anterior tibiotalar
■ Posterior tibiotalar
What are the superficial components of the deltoid ligament?
■ Tibionavicular
■ Tibiocalcaneal
What are the components of the medial longitudinal arch of the foot?
■ Spring ligament (plantar calcaneonavicular ligament)
■ Medial and posterior talocalcaneal ligaments
What are the Syndesomotic ligaments?
- Anterior tibiofibular ligament
- Posterior tibiofibular ligament
- Transverse tibiofibular ligament
- Interosseous ligament
What are the muscles and innervation of toe flexion?
– FDL – FHL – FDB – FHB – Quadratus plantae – Interossei – Flexor digiti minimi brevis – 1st lumbrical – 2nd-4th lumbricals
What are the muscles and innervation of toe extension?
– Extensor digitorum longus – Extensor hallucis longus – Extensor digitorum brevis – 1st lumbrical – 2nd-4th lumbricals
What are the muscles and innervation of toe abduction?
– Abductor hallucis
– Abductor digiti minimi
– Dorsal interossei
What are the muscles and innervation of toe adduction?
– Adductor hallucis
– Plantar interossei
What is the MOI for lateral ankle sprains?
Inversion of a plantar-flexed foot places the foot in the most vulnerable position to cause ligamentous injury
What does the anterior drawer test of the ankle examine?
Integrity of ATFL
What does the talar tilt test of the ankle examine?
Integrity of CFL and ATFL
What is a grade I ankle sprain?
– Partial tear of ATFL – CFL and PTFL intact – Mild swelling with TTP at lateral ankle – No instability – Stress tests negative
What is a grade II ankle sprain?
– Complete tear of ATFL
– Partial tear of CFL
– Diffuse swelling/ ecchymosis
– (+) Anterior drawer
What is a grade III ankle sprain?
– Complete tear of the ATFL and CFL
– (+) Anterior drawer
– (+) Talar tilt
What x-ray views should be done in ankle sprain?
AP, lateral, oblique and stress views: Anterior drawer and talar tilt
What indicates rupture of all 3 ankle ligaments on x-ray?
Tilting more than 30°
What is the treatment for grade I and II ankle sprain?
■ RICE, NSAIDs, analgesics, immobilization
■ Early mobilization
■ PT: ROM, strengthening, proprioceptive exercises, taping, and bracing
■ Modalities: Moist heat, warm whirlpool, contrast baths, ultrasound, short wave diathermy
What is the treatment for grade III ankle sprain?
■ 6 mo trial of rehab and bracing
■ Ligament repair, tenodesis of the peroneus brevis.
What are indications for surgery in ankle sprain?
Large bony avulsions
Severe ligamentous damage
Severe recurrent injuries
What is the MOI for peroneal tenosynovitis or rupture?
Repetitive forceful eversion
What is the MOI for peroneal subluxation or dislocation?
Sudden dorsiflexion of the ankle
Skiing injury
What is the clinical presentation of peroneal tenosynovitis?
Painful swelling in the lateral retromalleolar area along the course of the peroneal tendons
What is the clinical presentation of peroneal rupture, subluxation or dislocation?
Sudden weakness with the inability to actively evert the foot
What is the treatment of peroneal rupture, subluxation or dislocation?
Orthopedic evaluation
4 to 6 weeks of immobilization in a plantar-flexed position
What is the MOI of a medial ankle sprain?
Foot caught in a pronated, everted position with internal rotation of the upper body
What are the grading scales for medial ankle sprain?
- Grade 1: Stretch
- Grade 2: Stretch partial tear
- Grade 3: Full tear
What are complications of medial ankle sprain?
Syndesmosis ankle injuries
Maisonneuve fractures
What is the MOI of tibialis posterior tenosynovitis?
Repetitive forceful inversion
Hyperpronation
What is the clinical presentation of tibialis posterior tenosynovitis?
- Insidious onset of posteromedial ankle pain
- Medial hind foot swelling
- Pain with push-off
- Weakness with inversion and plantar flexion
What exam finding is seen with tibialis posterior rupture?
“Too many toes” sign
From behind more toes are visible on the affected side 2/2 collapse of the medial longitudinal arch
What is Malicious malalignment syndrome?
Broad pelvis Inc femoral anteversion Squinting patellae Excessive Q angle Excess pronation of the foot
What is the MOI of Achilles tendonitis?
Repetitive eccentric overload
What are causes of Achilles tendon rupture?
– Inflammatory: microruptures of collagen fibers
– Vascular: Inadequate vascularization 2 to 6 cm proximal to the insertion of the tendon
– Mechanical: Sudden push-off with the foot in the extension position