Contents
Anatomy
General information
- This section is strictly limited to anatomy, you might be looking for clinical relevant information which is found under the clinical chapters -- muscles section, click here to go to that page
Position
- Mainly deep
Origin
- Middle 2/4 of anterior part of fibula
- Middle 2/4 of membrana interosseous
Insertion
- Dorsal surface of the distal phalanx of the big toe
Main function
- MTP 1
- Extension
- IP 1
- Extension
Secondary function
- Ankle
- Dorsiflexion
- Foot
- Inversion
Nerve innervation
- Segmental
- L5-S1
- Peripheral
- Deep part of the peroneal nerve
Arterial supply
- Anterior branch of the tibial artery
Palpation
- Patient position
- Sitting or supine
- Place one hand at the dorsal side of the patient's foot
- Ask the patient to actively extend the big toe while you feel for the contraction in the tendon
- When you have palpated the tendon continue to feel for it in a proximal direction
- It is possible to palpate it up until the distal 1/2 of the calf until it disappears deep to the tibialis anterior and extensor digitorum longus tendon
Strength test
- Patient position
- Sitting or supine
- Grab the patient's heel and hold the foot stable in a slight plantarflexed position
- Give resistance at the dorsal surface of the patient's big toe in a flexion direction
- The patient gives force towards extension of the big toe
- This test also affects the extensor hallucis brevis