click below
click below
Normal Size Small Size show me how
Ankle & Foot Joints
Muscles of the Ankle & Foot (Origins, Insertions, Actions, & Innervations)
| Question | Answer |
|---|---|
| Origin of Gastrocnemius | Posterior surfaces of two condyles of femur |
| Insertion of Gastrocnemius | Posterior surface of the calcaneus (Achilles tendon) |
| Action of Gastrocenemius | Plantar flexion of the ankle |
| Innervation of Gastrocnemius | Tibial nerve |
| Origin of Soleus | Posterior surface of the proximal fibula and proximal 2/3 of the posterior tibial surface |
| Insertion of Soleus | Posterior surface of the calcaneus |
| Action of Soleus | Plantar flexion of the ankle |
| Innervation of Soleus | Tibial nerve |
| Origin of Tibialis posterior | Posterior surface of the upper half of the interosseus membrane and the adjacent surfaces of the tibia and fibula |
| Insertion of Tibialis posterior | Inferior surfaces of the navicular, cuneiform, and cuboid bones and bases of the 2nd, 3rd, and 4th metatarsal bones |
| Action of Tibialis posterior | Inversion of the foot |
| Innervation of Tibialis posterior | Tibial nerve |
| Origin of Flexor Digitorum Longus | Middle 1/3 of the posterior surface of the tibia |
| Insertion of Flexor Digitorum Longus | Base of the distal phalanx of each of the four lesser toes |
| Action of Flexor Digitorum Longus | Flexion of the four lesser toes |
| Innervation of Flexor Digitorum Longus | Tibial nerve |
| Origin of Flexor Hallucis Longus | Middle 2/3 of the posterior surface of the fibula |
| Insertion of Flexor Hallucis Longus | Base of the distal phalanx of the great toe |
| Action of Flexor Hallucis Longus | Flexion of the great toe |
| Innervation of Flexor Hallucis Longus | Tibial nerve |
| Origin of Peroneus (fibularis) longus | Head and upper 2/3 of the lateral surface of the fibula |
| Insertion of Peroneus (fibularis) longus | Undersurfaces of the medial cuneiform and 1st metatarsal bone |
| Action of Peroneus (fibularis) longus | Eversion of the foot |
| Innervation of Peroneus (fibularis) longus | Superficial peroneal nerve |
| Origin of Peroneus (fibularis) brevis | Mid to lower 2/3 of the lateral surface of the fibula |
| Insertion of Peroneus (fibularis) brevis | Tuberosity of the 5th metatarsal bone |
| Action of Peroneus (fibularis) brevis | Eversion of the foot |
| Innervation of Peroneus (fibularis) brevis | Superficial peroneal nerve |
| Origin of Peroneus (fibularis) tertius | Distal 1/3 of the anterior fibula |
| Insertion of Peroneus (fibularis) tertius | Superior aspect of the base of the 5th metatarsal |
| Action of Peroneus (fibularis) tertius | Dorsiflexion of the ankle |
| Innervation of Peroneus fibularis) tertius | Deep peroneal nerve |
| Origin of Extensor digitorum longus | Lateral condyle of the tibia, head of the fibula, and upper 2/3 of the anterior surface of the fibula |
| Insertion of Extensor digitorum longus | Tops of the middle and distal phalanges of the four lesser toes |
| Action of Extensor digitorum longus | Extension of the four lesser toes |
| Innervation of Extensor digitorum longus | Deep peroneal nerve |
| Origin of Extensor hallucis longus | Middle 2/3 of the medial surface of the anterior fibula |
| Insertion of Extensor hallucis longus | Base of the distal phalanx of the great toe |
| Action of Extensor hallucis longus | Extension of great toe |
| Innervation of Extensor hallucis longus | Deep peroneal nerve |
| Origin of Tibialis anterior | Upper 2/3 of the lateral surface of the tibia |
| Insertion of Tibialis anterior | Inner surface of the medial cuneiform and the base of the 1st metatarsal bone |
| Action of Tibialis anterior | Dorsiflexion of the ankle |
| Innervation of Tibialis anterior | Deep peroneal nerve |