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Lab 8: Lower Limb

Muscles, Nerves and Movement

QuestionAnswer
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.
Created by: arieal1