what is the origin of biceps femoris m?

insertion?

action?

innervation?

artery?

• long head: ischial tuberosity; short head: lateral lip of the linea aspera
• head of fibula and lateral condyle of the tibia
• extends the thigh, flexes the leg
• long head: tibial nerve; short head: common fibular (peroneal) nerve
• perforating branches of the deep femoral a.
• one of the "hamstring" muscles

what is the origin of semitendinosus m?

insertion?

action?

innervation?

artery?

• lower, medial surface of ischial tuberosity (common tendon with biceps femoris m.)
• medial surface of tibia (via pes anserinus)
• extends the thigh, flexes the leg
• tibial nerve
• perforating branches of the deep femoral a.
• pes anserinus is the common insertion for the gracilis, sartorius, and semitendinosus mm.

what is the origin of semimembranosus m?

insertion?

action?

innervation?

artery?

• upper, outer surface of the ischial tuberosity
• medial condyle of the tibia
• extends the thigh, flexes the leg
• tibial nerve
• perforating branches of the deep femoral a.
• one of the "hamstring" muscles

what is the source of the posterior cutaneous nerve of the thigh?

branches?

motor?

seonsry?

• sacral plexus (ventral primary rami of spinal nerves S1-S3)
• inferior cluneal nn.; perineal br.
• sympathetic motor innervation to skin
• skin of the lower buttock & posterior thigh
• cutaneous nn. carry postganglionic sympathetic axons to skin

what is the source of the tibial nerve?

branches?

motor?

seonsry?

• sciatic n.
• medial sural cutaneous n., medial calcaneal brs., medial and lateral plantar nn.
• semimembranosus m., semitendinosus m., long head of biceps femoris m., ischiocondylar portion of adductor magnus m.; mm. of the superficial and deep posterior compartments of the leg (gastrocnemius m., soleus m., plantaris m., tibialis posterior m., flexor hallucis longus m., flexor digitorum longus m.); muscles of the plantar side of the foot
• skin of the plantar surface of the foot and toes; skin of the dorsal surface of the distal toes (nail bed region)
• tibial n. is the larger of the two divisions of the sciatic n.

what is the source of the common fibular nerve?

branches?

motor?

seonsry?

• sciatic n.
• lateral sural cutaneous n., superficial and deep fibular nn.
• superficial fibular n.: muscles of the lateral compartment of the leg (fibularis longus and brevis mm.); deep fibular n.: muscles of the anterior compartment of the leg (tibialis anterior m., extensor hallucis longus m., extensor digitorum longus m., fibularis tertius m.) and muscles of the dorsum of the foot (extensor digitorum brevis m.and extensor hallucis brevis m.)
• superficial fibular n.: distal 1/3 of the anterior surface of the leg, dorsum of the foot excluding the web between the great toe and the 2nd toe and distal interphalangeal segments of all toes; deep fibular n.: skin of the web between the great toe and the 2nd toe
• "peroneal" is old terminology which has been replaced by "fibular"

what is the source fo the deep femoral artery?

branches?

supply to?

• femoral a.
• medial circumflex femoral a., lateral circumflex femoral a., perforating aa. (3 or 4)
• hip joint, proximal thigh, posterior thigh
• deep femoral a. is the primary blood supply to muscles of the posterior compartment of the thigh

what is the source fo the genicular, superior lateral artery?

branches?

supply to?

• popliteal a.
• no named branches
• lateral aspect of knee
• superior lateral genicular a. anastomoses with the other genicular brs. of the popliteal a., circumflex fibular a. and anterior tibial recurrent a. to form the genicular anastomosis

what is the source fo the genicular, superior medial artery?

branches?

supply to?

• popliteal a.
• no named branches
• medial aspect of knee
• superior medial genicular a. anastomoses with the other genicular brs. of the popliteal a., circumflex fibular a. and anterior tibial recurrent a. to form the genicular anastomosis

what is the source fo the genicular, middle artery?

branches?

supply to?

• popliteal a.
• no named branches
• cruciate ligaments and deep structures of the kne
• middle genicular a. anastomoses with the other genicular brs. of the popliteal a., circumflex fibular a. and anterior tibial recurrent a. to form the genicular anastomosis

what is the source fo the genicular, inferior lateral?

branches?

supply to?

• popliteal a.
• no named branches
• lateral aspect of the knee
• inferior lateral genicular a. anastomoses with the other genicular brs. of the popliteal a., circumflex fibular a. and anterior tibial recurrent a. to form the genicular anastomosis

what is the source fo the genicular, inferior medial?

branches?

supply to?

• popliteal a.
• no named branches
• medial aspect of the knee
• inferior medial genicular a. anastomoses with the other genicular brs. of the popliteal a., circumflex fibular a. and anterior tibial recurrent a. to form the genicular anastomosis

what is the origin of popliteus m?

insertion?

action?

innervation?

artery?

lateral condyle of the femur

posterior surface of the tibia above soleal line

flexes and rotates the leg medially (with the foot planted, it rotates the thigh laterally)

tibial nerve

popliteal a.

has a round tendon of origin; popliteus unlocks the knee joint to initiate flexion of the leg

what is the origin of gastrocnemius m?

insertion?

action?

innervation?

artery?

• femur; medial head: above the medial femoral condyle; lateral head: above the lateral femoral condyle
• dorsum of the calcaneus via the calcaneal (Achilles') tendon
• flexes leg; plantar flexes foot
• tibial nerve
• sural aa. (from the popliteal a.), posterior tibial a.
• (from the popliteal a.), posterior tibial a. the calcaneal tendon of the gastrocnemius and soleus is the thickest and strongest tendon in the body

what is the source of the sural artery?

branches?

supply to?

popliteal a.

unnamed muscular aa.

gastrocnemius m., soleus m., plantaris m.