Common distortions caused by the weakness is foot drop and collapse of medial longitudinal arch
ExTENSOR HALLuCIS LONGuS
Joint Action performed by the First metatarsophalangeal and First interphalangeal joints
- Extension – for both joints
Joint Action performed by the Ankle and Foot
- Dorsiflexion (assists)
- Inversion (assists) – respectively
Origin: Fibula – distal two thirds (anterior aspect) Interosseous membrane
Insertion: First distal phalanx – base
Common distortions due to tightness is a depression of the first metatarsal
ExTENSOR HALLuCIS BREVIS
Joint Action performed by the First metatarsophalangeal joint
- Extension
For example points big toe up
Origin: 1. Calcaneus – Superior and lateral aspects
- Lateral talocalcaneal
- Extensor retinaculum – Inferior
Insertion: First proximal phalanx – Base (dorsal surface)
Common distortions caused by weakness is depression of the first metatarsal