Posterior thigh

Question 1

Name the hamstring muscles

Answer 1

Semimembranosus
Semitendinosus
biceps femoris (long head)

Question 2

Semimembranosus - Origin , Insertions, Innervation, Action

Answer 2

o- Superior lateral quadrant of ischael tuberosity
i - Posterior surface of the medial tibial condyle
i- TIBIAL NERVE - (L5, S1, S2)
A - Extends thigh, flexes Knee, rotates tibia medially - especially when knee flexed

Question 3

Semitendinosos - Origin, Insertion, Innervation, Action

Answer 3

o - common tendon - superior medial quadrant of posterior portion of ischael tuberosity
i - superior aspect of the medial portion of the shaft of tibia
i- tibial nerve - L5, S1,S2
a - Extends thigh, flexes Knee, rotates tibia medially - especially when knee flexed

Question 4

Biceps femoris - origin, insertion, innervation, action

Answer 4

o - common tendon - superior medial quadrant of posterior portion of ischael tuberosity
i- fibula head and lateral collateral ligament and tibial condyle
i- tibial nerve L5,S1,S2
a- Flexes knee, rates tibia laterally, extends hip joint

Question 5

why is the short head of bicepts femoris NOT part of the hamstrings

Answer 5

does not share the common proximal attachment and innervation

Question 6

what compartment does short head of biceps femoris belong to

Answer 6

Flexor compartment

Question 7

Biceps femois - short head - Origins, insertion, innervation and actoin

Answer 7

o- lateral lip of linea aspera
i - fibular head, lateral tibial condyle
i - common peroneal portion of sciatic nerve (both L5, S1
a - Flexes and laterally rotates knee

Question 8

Function of hamstrings at hip

Answer 8

extend the hip

Question 9

function of hamstrings at knee

Answer 9

flex knee
semimembranosus/ semitendinosus - medial tibial rotation
long head biceps - lateral tibial rotation

Question 10

Adductor Magnus is from which compartment

Answer 10

considered part of Hamstrings

MEDIAL muscle compartment

Question 11

What are the two parts of adductor magnus

Answer 11

hamstring part - vertical head

adductor part - oblique head

Question 12

Adductor Magnus - Oblique Head - Origin, Insertion, innervation, action

Answer 12

o - inferior ramis of pubis and ischael ramis
i - gluteal tuberosity, linea aspera, proximal supraepicondyle line of femur
i - Obturator nerve - L2 -L4
a - adduct and flex at hip

Question 13

Adductor magnus - vertical head - O, I, Innervation, A

Answer 13

o - ischael tuberosity
i - adductor tubercle of femur
i - sciatic nerve L2 - L4)
a - extend thigh at hip

Question 14

what runs through perforations in adductor magnus

Answer 14

branches of deep artery of the thigh

most inferior perforation = terminal end of deep artery of the thigh

Question 15

what does the sciatic nerve divide into

Answer 15

Common Fibular (peroneal) and Tibial Nerves

Question 16

what direction does the common fibular nerve deviate

Answer 16

laterally

Question 17

what direction does the tibial nerve travel

Answer 17

down the midline

Question 18

where doe the branches of sciatic nerve enter

Answer 18

popliteal fossa

Question 19

What is the popliteal fossa

Answer 19

diamond shaped depression on the posterior aspect of the knee

Question 20

what muscles form the borders of the popliteal fossa

x4

Answer 20

biceps femoris, semimembranosus, semitendinosus, medial and lateral heads of Gastrocnemius

Question 21

what runs through the popliteal fossa

Answer 21

tibial nerve
popliteal vein
popliteal artery

Question 22

what nerve runs along the lateral edge of the popliteal fossa

Answer 22

common perineal nerve

Question 23

what vessel emerges from between the heads of gastrocnemius

Answer 23

small saphenous vein

Question 24

what forms the roof of the popliteal fossa

Answer 24

deep fascia - continuous with fascia late of the thigh and the deep fascia of the leg

Question 25

what forms the floor of the popliteal fossa

Answer 25

capsule of the knee joint, adjacent surfaces of the femur and tibia, inferiorly popliteus muscle

Question 26

Gastrocnemius Muscle - origin, insertion, innervation, action

Answer 26

o - medial head - medial condyle of femur, Lateral head - Lateral condyle of femur.
i - posterior calcaneus via calcaneal tendon
i - tibial nerve S1,S2
a - plantar flexes, and flex knee

Question 27

what is another name for achilles tendon

Answer 27

calcaneal tendon

Question 28

muscles of the superficial posterior compartment of the leg

Answer 28

grastrocnemius
soleus
plantaris

Question 29

Soleus Muscle - origin, insertion, innervation, action

Answer 29

o - proximal 1/2 posterior tibia on soleal line and proximal 1/3 posterior fibia
i - posterior calcaneus vis calcaneal tendon
i - tibial nerve s1, s2
a - plantar flexes foot

Question 30

Plantaris muscle - origin, insertion, innervation, action

Answer 30

o - inferior lateral supracondylar ridge of femur above lateral gastrocnemius
i - posterior calcaneus
i - tibial nerve - l4, l5, s1
a - plantar flex foot and knee