Posterior Thigh Muscles

Question 1

Muscles that make up the posterior thigh

Answer 1

semitendinosus
semimebranosus
biceps femoris

all compose the hamstring

Question 2

semitendinosus

function
innervation

Answer 2

begins 2/3 of way down thigh

extends thigh, medially rotates and flexes leg
tibial division of sciatic nerve

Question 3

General function of all the hamstring muscles

Answer 3

thigh extensions (except short head of biceps femoris)
flexes above the knee 

leg extension

Question 4

general innervation of all hamstring muscles

Answer 4

tibial decision of sciatic (except biceps femoris)

Question 5

semitendinosus attachements

Answer 5

ischial tuberosity and medial surface of superior aspect of tibia

Question 6

semimembranosus

function innervation

Answer 6

extends thigh, flexes leg

tibial division of sciatic nerve

Question 7

hamstring attachments (common origin)

Answer 7

ischial tuberosity

Question 8

two parts of semimembranosus

Answer 8

based on insertion on the distal tendon

divides into parts that go to the medial tibial condyle and part that blends with popliteal fascia to become the oblique popliteal ligament

Question 9

oblique popliteal ligament

Answer 9

reinforces the intercondyler part of joint capsule of knee

Question 10

biceps femoris long head

function and innervation

Answer 10

flexes leg, extends thigh

tibial division of sciatic nerve

Question 11

biceps femoris is different from rest of hamstrings because

Answer 11

has two parts with two different innervations

Question 12

biceps femoris short head

function and innervation

Answer 12

flexes leg

common fibular branch of sciatic nerve

Question 13

adductor magnus (hamstring portion) function and innervation

Answer 13

extends thigh, tibial division of sciatic nerve

medial and superior to most other hamstring and thigh muscles

Question 14

diamond shaped region posterior to knee

Answer 14

popliteal fossa

Question 15

list 4 boundaries of political fossa

Answer 15

1. superomedially
2. superolaterally
3. inferolaterally
4. inferomedially

Question 16

contents of political fossa

Answer 16

nerves
popliteal vein, lymph nodes and branches
popliteal artery and branches

Question 17

superomedial boundary of popliteal fossa

Answer 17

semitendinosus and semimebranosus

Question 18

superolateral boundary of popliteal fossa

Answer 18

biceps femoris

Question 19

inferolateral boundary of popliteal fossa

Answer 19

lateral head of gastrocnemius

Question 20

inferomedial boundary of popliteal fossa

Answer 20

medial head of gastrocnemius

Question 21

where does popliteal artery arise?

Answer 21

from femoral artery after passage through adductor hiatus

Question 22

attachments of biceps femoris

Answer 22

long head (ischial tuberosity)
short head (distal lateral lip of linea aspera)

common insertion on head of fibula

Question 23

attachment of adductor magnus (hamstring portion)

Answer 23

origin: ischial tuberosity
insertion: medial epicondyle of femur

Question 24

deepest structure of popliteal fossa

Answer 24

popliteal artery

Question 25

anastomoses of popliteal artery is via

Answer 25

genicular branches that run close to knee joint capsule

Question 26

Arteries that compose the genicular anastomosis

Answer 26

superior lateral genicular artery inferior lateral genicular artery superior medial genicular artery inferior medial genicular artery

Question 27

what joins the genicular branches

Answer 27

descending branch of lateral femoral circumflex artery joins it when coming from top of hip provides alternative blood route to leg should femoral artery become occluded

Question 28

what do the genicular branches supply

Answer 28

capsule and ligaments of knee joints

Question 29

why would blood bypass popliteal artery?

Answer 29

knee is fully flexed too long narrowed or occluded popliteal vessels

Question 30

termination of popliteal artery

Answer 30

divides into anterior and posterior tibial arteries

Question 31

what is the popliteal vein formed by

Answer 31

union of anterior and posterior tibial veins near inferior border of popliteus muscle

Question 32

where is the termination of small saphenous vein

Answer 32

politeal vein

Question 33

relationship of the location of popliteal vein and political artery

Answer 33

the popliteal vein lies superficial to and in same fibrous sheath as artery

Question 34

where does the popliteal vein become femoral vein?

Answer 34

after traversing adductor hiatus

Question 35

nerves that compose the popliteal fossa

Answer 35

tibial and common fibular nerve the popliteal fossa is where the sciatic nerve ends

Question 36

tibial nerve

Answer 36

most superficial superficial to deep posterior leg muscles knee joint

Question 37

common fibular nerve (peroneal nerve)

Answer 37

leaves popliteal fossa by passing superficial to lateral head of gastrocnemius winds around head and neck of fibula (injury)

Question 38

what does the common fibular (peroneal) nerve terminate into?

Answer 38

deep fibular superficial fibular nerve

Question 39

sural nerve

Answer 39

innervates the skin of the region | runs with saphenous