Question | Answer |
What are the 3 major nerves that supply the lower extremity? | femoral nerve, sciatic nerve, & obturator nerve |
This nerve supplies the muscles of the anterior compartment of the thigh. | Femoral nerve |
This nerve supplies the muscles of the medial (adductor) compartment of the thigh. | Obturator nerve |
This is really 2 nerves that are bundled into 1 nerve in the thigh (tibial n. and common fibular n.). | Sciatic nerve |
This nerve supplies the posterior compartment of the thigh, leg, & plantar surface of the foot. | Tibial nerve |
This nerve supplies the anterior & lateral compartments of the leg and doral surface of the foot. | Common fibular nerve |
As the external iliac artery passes into the thigh, it is renamed_______________. This is the main artery to the lower extremity. | femoral artery |
This artery supplies anterior of the thigh. | Femoral artery |
This branch of the femoral artery supplies the posterior compartment of the thigh. | deep artery of the thigh |
As the femoral artery passes behind the knee it is renamed___________ and supplies around the knee. | popliteal artery |
As the popliteal artery enters the leg, it branches into the________ and________. | anterior tibial and posterior tibial arteries. |
The anterior tibial artery ends as the ________ of the foot. | dorsalis pedis artery |
A branch of the posterior tibial artery that supplies the lateral compartmet of the lef. | fibular artery |
The posterior tibial artery ends as the _________. | medial and lateral plantar arteries of the foot. |
Innervaterd by Anterior rami of lumbar nn
This muscle acts conjointly in flexing thigh at hip joint & in stabilizing this joint. | Iliopsoas |
Innervated by Inferior gluteal n
This muscle extends thigh & assists in its lateral rotation; steadies thigh & assists in rising from sitting position | Gluteus maximus |
Innervated by Superior gluteal n
Abducts & medially rotates thigh | Gluteus medius & Gluteus minimus |
Innvervated by Femoral nerve
This muscle flexes, abducts, & laterally rotates thigh at hip joint; flexes leg at knee joint | Sartorius |
These muscles are innervated by the femoral nerve. They extend leg at knee joint; rectus femoris also steadies hip joint & helps iliopsoas flex thigh | Rectus femoris, Vastus medialis, Vastus intermedius, Vastus lateralis |
These muscles are innervated by the sciatic nerve. They flex leg & rotate it laterally when knee is flexed; extends thigh | Biceps femoris |
These nerves are innervated by the tibial division of the sciatic nerve. They extend thigh; flex leg & rotate it medially when knee is flexed | Semimembranous & Semitendinosus |
Innervated by obturator nerve. Adducts thigh; flexes leg; helps rotate leg medially | Gracilis |
Innervated by Obturator neve. Adducts thigh. | Adductor longus |
Innervated by Obturator nerve & tibial part of sciatic nerve. Adducts thigh; flexes thigh & extends thigh | Adductor magnus |
Innervated by obturator nerve. Adducts thigh; to some extent flexes it | Adductor brevis |
Adducts & flexes thigh; assist w. medial rotation of thigh | Pectineus |
Innervated by deep fibular nerve. Dorsiflexes ankle & inverts foot. | Tibialis anterior |
Innervated by deep fibular nerve. Extends lateral 4 digits & dorsiflexes ankle | Extensor digitorum longus |
Innervated by deep fibular nerve. Extends great toe & dorsiflexes ankle | Extensor hallucis longus |
Innervated by Superficial fibular nerve. These muscles of the lateral leg everts foot & weakly plantarflexes ankle. | Fibularis longus & Fibularis brevis |
Innervated by Tibial nerve. Plantarflexes ankle when knee is extended; raises heel during walking; flexes leg at knee joing | Gastrocnemius |
Innervated by Tibial nerve. Plantarflexes ankle independently of knee position; steadies leg on foot | Soleus |
Innervated by Tibial nerve. Weakly flexes knee & unlocks it; medially rotates ribia of unplanted limb | Popliteus |
Innervated by Tibial nerve. Flexes great toe | Flexor hallucis longus |
Innervated by Tibial nerve. Flexes lateral four digits; plantarflexes ankle | Flexor digitorum longus |
Plantarflexes ankle; inverts foot | Tibialis posterior |
Innervated by deep fibular nerve. Aides the extensor digitorum longus in extending the 4 medial toes | Extensor hallucis brevis |
Innervated by deep fibular nerve. Aidses the extensor hallucis longus in extending the great toe | Extensor digitorum brevis |
Innervated by medial plantar nerve. Abducts & flexes 1st digit (great toe, hallux) | Abductor hallucis |
Innervated by medial plantar nerve. Flexes lateral 4 digits. | Flexor digitorum brevis |
Innervated by Lateral plantar nerve. Abducts & flexes little toe (5th digit) | Abductor digiti minimi |
Innervated by Lateral plantar nerve. Assists flexor digitorum longus in flexing lateral 4 digits | Quadratus plantae |
Innervated by medial plantar nerve. Flexes proximal phalanx of 1st digit. | Flexor hallucis brevis |
Innervated by lateral plantar nerve. Adducts 1st digit | Adductor hallucis |
Innervated by lateral plantar nerve. Flexes proximal phalanx of 5th digit, thereby assisting w. its flexion | Flexor digiti minimi brevis |
Innervated by lateral plantar nerve. Adducts digits (3-5) & flex metatarsophalangeal joints | Plantar interossei |
Abduct digits (2-4) & flex metatarsophalangeal joints | Dorsal interossei |
What is the function of the anterior cruciate ligament (ACL)? | It prevents posterior displacement of the femur on the tibia & hyperextenstion of the knee joint. |
What is the function of the posterior cruciate ligament (PCL)? | It prevents the anteriior displacement of the tibia on the femur & helps prevent hyperflexion of the knee joint. It is the main stabilizing factor for the femur. |