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ant/pos leg
leg
| Question | Answer |
|---|---|
| What is the sinus tarsi? | channel between calcaneous and talus- filled with interosseus ligament in life |
| L4 dermatome | medial leg |
| L5 dermatome | lateral leg dorsum of foot, big toe |
| S1 dermatome | lateral foot, posterior leg |
| Saphenous N (cutaneous) | branch of femoral, medial leg |
| superficial peroneal | lateral lower leg, dorsum of foot |
| sutaneous branch of deep peroneal | space between the big and second toe |
| lateral sural (branch of common peroneal) | lateral upper leg |
| Medial sural (branch of tibial) | most of posterior leg |
| Deep fascia is continuous with | fascia lata |
| What forms retinacula at the ankle? | fascia |
| Name the retinacula at the ankle | extensor, peroneal, and flexor |
| Extensor retinacula- name the 2 bands | lies anterior to ankle- 2 bands: superior, inferior (y shaped) |
| Peroneal retinacula | lateral ankle |
| This retinaculum has 1 compartment, tendons in common sheath | superior peroneal retinaculum |
| Inferior retinaculum | has 2 compartments and the tendons in seperarte sheaths |
| Flexor retinaculum | medial/posterior medial malleolus to calcaneous |
| Name the muscles in the anterior compartment of the leg | tibialis anterior, extensor hallucius longus, extensor |
| O- upper 2/3 tibia, I- medial cuneiform, base of first metatarsal | Anterior tibialis |
| dorsiflexion and inversion | anterior tibialis |
| O- lower fibula and interosseus membrane, I- base of distal phalanx of hallux | extensor hallucis longus |
| dorisflexion, and extends hallux | extensor hallucis longus |
| O-lateral condyle of tibia, upper fibula, interosseus membrane, I- middle and distal phalanges of 4 lateral toes | extensor digitorum longus |
| extends toes, dorsiflexion, eversion | extensor digitorum longus |
| This muscle is continous with extensor digitorum longus and inserts on the base of the 5th metatarsal | peroneous teritus |
| dorsiflexion and eversion | peroneous teritus |
| Name the muscles of the dorsum of the foot | extensor hallicus brevis and extensor digitorum brevis |
| O-calcaneus, I- proximal phalanx great toe | extensor hallicus brevis |
| extends proximal phalanx of hallus | extensor hallicus brevis |
| Action of extensor digitorum brevis | extends toes without dorsiflexion |
| O-with extensor hallicus brevis, I-via tendon into tendons of extensor digitorum longus going to 2nd,3rd, and 4th toes | extensor digitroum brevis |
| Which nerve innervates all the muscles of the anterior compartment of the leg and dorsum of the foot? | deep peroneal n. |
| O-head and upper fibula, I- medial cuneiform and base of 1st metatarsal (mirrors ant. tib) | peroneous longus |
| Eversion, plantar flexion | peroneous longus |
| O-lower fibula, I- tuberosity of 5th metatarsal | peroneous brevis |
| action of peroneous brevis | eversion, plantar flexion |
| What nerve innervates the muscles of the lateral compartment of the leg? | superficial peroneal n. |
| O-medial and lateral heads from medial and lateral femoral condyles, I-calcaneus via tendocalcaneus | gastrocnemius |
| Action of gastrocnemius | plantar flexion, knee flexion |
| Plantaris O and I | O-lateral epicondyle of femur, I-tendocalcaneus via ribbon-like tendon |
| Which muscle is a very weak plantar flexion | plantaris |
| O-upper fibula, soleal line and middle tibiaI-tendocalcaneus | soleus |
| "triceps surae" | soleus and 2 heads of gastroc |
| popliteus O and I | O-lateral condyle (femur)I- posterior tibia above soleal line forms floor of popliteal fossa |
| Action of popliteus | flexes knee, unlocks knee from terminal extension |
| O-middle, posterior fibulaI- distal phalanx of great toe | flexor hallicus longus |
| Flexion of great toe, plantar flexion | flexor hallicus longus |
| O-tibis, fibula and interosseous membraneI- tuberosity of navicular, then broad tendon to all cuneifroms, cuboid, 2nd, 3rd, and 4th metatarsals | tibialis posterior |
| Principle inverter, also plantar flexes | tibialis posterior |
| flexor digitorum longus | o-middle tibia, I- distal phalanx 4 lateral toes |
| flexes 4 toes, weak plantar flexor, inverter | flexor digitorum longus |
| Flexor retinaculum | from medial malleolus to calcaneus, each tendon has its own tendon sheath "tom, dick, harry" |
| What nerve innervates the muscles of the posterior leg? | tibial N. |
| The sciatic nerve divides in the _____ _____ into the _____ and ______ ______ nerves. | popliteal fossa, tibial and common peroneal |
| Tibial Nerve | L4,5,S1,2,3 |
| What nerve continues into the posterior compartment between the superficial and deep muscle groups? | tibial nerve |
| The tibial nerve continues into... | the sole of the foot behind the medial malleolus |
| Common peroneal nerve | L4,5, S1,2 |
| What nerve passes around the neck of the fibula where it divides into deep and superficial branches? | Common peroneal nerve |
| Superficial peroneal nerve | innervates the lateral compartment and skin of the lateral leg and dorsum of the foot |
| L5,S1,2 | superficial peroneal nerve |
| Deep peroneal nerve | L4,5,S1 |
| What is a deep branch of the common peroneal nerve that enters the anterior compartment and innervates muscles and patch of skin between great and 2nd toe | Deep peroneal nerve |
| What artery divides into anterior tibial a. and posterior tibial a. on the popliteus muscle? | popilteal a. |
| what artery enters anterior compartment by crossing above interosseous membrane? | anterior tibial artery |
| Anterior tibial artery changes name to what when it crosses ankle joint into the foot? | dorsalis pedis artery |
| Posterior tibial artery runs with what nerve? | tibial nerve |
| Posterior tibial artery gives off... | peroneal artery that runs lateral side of posterior compartment-then sends branches into lateral compartment |
| Which artery continues into the foot behind the medial malleolus? | posterior tibial artery |
Created by:
swedickj
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