Posterior Thigh

Question 1

what does the posterior thigh hold

Answer 1

hamstrings

Question 2

what is the nerve rule of the posterior thigh

Answer 2

innervated by the tibial part of the sciatic nerve

Question 3

what is the exception to the nerve rule

Answer 3

short head of the biceps

innervated by the fibular nerve

Question 4

muscles in the posterior compartment

Answer 4

semitendinosus

semimembranosus

biceps femoris

Question 5

semitendinosus origin

Answer 5

ischial tuberosity

sacrotuberous ligament (common head w/ long head of biceps femoris)

Question 6

semitendinosus insertion

Answer 6

medial to the tibial tuberosity in the pes anserinus (w/ gracilis and sartorius)

Question 7

semitendinosus innervation

Answer 7

tibial division of the sciatic nerve (L5,S1,S2)

Question 8

action of semitendinosus

Answer 8

hip: extension and stabilizes the pelvis in the sagittal plane

knee: flexion and medial rotation when knee is flexed

Question 9

origin of semimembranosus

Answer 9

ischial tuberosity of ischium

Question 10

insertion of semimembranosus

Answer 10

medial tibial condyle

oblique ligament

popliteus fascia

Question 11

innervation of semimembranosus

Answer 11

tibial division of sciatic nerve (L5,S1,S2)

Question 12

action of semimembranosus

Answer 12

hip: Extension and stabilizes the pelvis in the sagittal plane

knee: flexion and medial rotation when the knee is flexed

Question 13

biceps femoris has

Answer 13

2 heads

long head

short head

Question 14

biceps femoris long head origin

Answer 14

ischial tuberosity

sacrotuberous ligament (common head w/ semitendinosus)

Question 15

biceps femoris long head insertion

Answer 15

head of the fibula

Question 16

biceps femoris long head innervation

Answer 16

tibial division of sciatic nerve (L5,S1, S2)

Question 17

biceps femoris long head action

Answer 17

hip joint: extension and stabilizes the pelvis in the sagittal plane

knee: flexion and lateral rotation when knee is flexed

Question 18

biceps femoris short head origin

Answer 18

lateral lip of the linea aspera in the middle third of the femur

Question 19

biceps femoris short head insertion

Answer 19

head of fibula

Question 20

biceps femoris short head innervation

Answer 20

common fibular division of sciatic nerve (L5, S1< S2)

Question 21

biceps femoris short head action

Answer 21

hip joint: stabilizes the pelvis in the sagittal plane

knee: flexion and lateral rotation when knee is flexed

Question 22

arteries

Answer 22

perforating arteries from profunda femoris

Question 23

veins

Answer 23

accompany arteries

Question 24

nerves

Answer 24

sciatic –> tibial and common fibular (peroneal divisions)

Question 25

peroneal division =

Answer 25

fibular division

Question 26

spaces in posterior compartment

Answer 26

popliteal fossa

Question 27

popliteal fossa boundaries

Answer 27

roof: skin, subcutaneous tissue, popliteal fascia

floor: oblique popliteal ligament, popliteal fascia, femur

superolateral: biceps femoris

superomedial: semitendinosus and semimembranosus

inferomedial: medial head of the gastrocnemius

inferolateral: lateral head of the gastrocnemius

Question 28

contents of popliteal fossa

Answer 28

Small saphenous vein

Sural nerve

Tibial nerve

Common fibular nerve

Popliteal vein

Popliteal artery

Popliteal lymph nodes and vessels

Question 29

Pes anserine

Answer 29

attachment point for sartorius, gracilis, semitendinosus

one muscle from each compartment attaches here

Say Grace before Tea (order the muscles are in more lateral to more medial)