Principles of Functional Exercise

QuADRATuS PLANTE

Joint Action performed by the Second, third, fourth and fifth digits

1. Assists line of pull of flexor digitorum longus


2. Flexion (assists)

Origin: 1. Medial Head – Calcaneus (Medial aspect)

2. Long plantar ligament (Medial aspect)


3. Lateral Head – Calcaneus (Lateral border – plantar aspect)


4. Long Plantar Ligament – lateral aspect

Insertion: Flexor digitorum longus tendon – tendon, dorsal, and plantar aspects

TIBIALIS ANTERIOR

Joint Action performed by the Ankle and Intertarsal

1. Dorsiflexion


2. Inversion (supination) – respectively

For example it pulls the foot up and heel walking

Origin: Tibia – lateral

Insertion: 1. Tarsal – Cuneiform (medial)

2. Metatarsal – first

Exercise for this muscle is reverse calf raise

Common distortions due to weakness include inability to dorsiflex, a foot drop during gait, and
the inability to performed a squat without lifting heels

ExTENSOR DIGITORuM LONGuS

Joint Action performed by the Second through fifth metatarsophalangeal joints

1. Flexion