Principles of Functional Exercise

Joint Action performed by Second through fifth interphalangeal joints

1. Flexion

Joint Action performed by the Ankle and Foot

1. Plantar Flexion


2. Eversion (assists) – respectively

For example points second through fifth toes up

Origin: 1. Tibia – Lateral condyle

2. Fibula – Proximal three fourths (anterior aspect) - Interosseous membrane,
   Intermuscular septum

Insertion: Second through fifth middle and distal phalanges – Attaches
via dorsal expansion hood

Common distortions caused by weakness is a collapse of the medial longitudinal arch
and a foot drop

ExTENSOR DIGITORuM BREVIS

Joint Action performed by Second through fifth metatarsophalangeal joints

1. Extension

Joint Action performed by the Second through fifth interphalangeal joints

1. Extension (assists)

For example points second through fifth toes up

Origin: 1. Calcaneus

2. Lateral talocalcaneal ligament

Insertion: Second through fifth middle and distal phalanges – Attaches, joining extensor digitorum
longus via dorsal expansion hood