Ankle and Foot Complex

Question 1

Open-Chain Pronation

Answer 1

Calcaneal dorsiflexion, abduction, and eversion

Question 2

Open-Chain Supination

Answer 2

Calcaneal plantarflexion, adduction, and inversion

Question 3

Closed Packed

Answer 3

Supinated; allows foot to act as a rigid lever; most congruent

Question 4

Loose Packed

Answer 4

Pronation

Question 5

Open-Chain TCJ Movement

Answer 5

Calcaneus does all of the movement: pronation/supination, inversion/eversion, plantarflexion/dorsiflexion

Question 6

Closed-Chain TCJ Movement

Answer 6

Calcaneus does inversion/eversion; Talus does plantarflexion/dorsiflexion, pronation/supination

Question 7

Calcaneovalgus

Answer 7

Subtalar pronation is
accompanied by
eversion (valgus) of the
calcaneus

Question 8

Calcaneovarus

Answer 8

Subtalar supination is
accompanied by
inversion (varus) of the
calcaneus

Question 9

Tibiofibular – Lateral Rotation

Answer 9

Subtalar joint- Supination (closed chain)
Calcaneus - Inversion – ROM 20⁰
External rotation of tibia heightens arch

Question 10

Tibiofibular – Medial Rotation

Answer 10

Subtalar joint- Pronation (closed chain)
Calcaneus – Eversion ROM 10⁰
Internal rotation of tibia collapses arch