Posterior aspect

Question 1

who delimit the perimeter of the popliteal fossa

lateral - medially - distally - roof - floor

Answer 1

• lateral: biceps femoris
• medially: semimembranosus and tendons of the pes anserine
• distally: two heads of the gastrocnemius
• roof: deep fascia
• floor: popliteal surface of the femur, the posterior capsule and the popliteus muscle

Question 2

semimembranosus, origin and attachment

Answer 2

• upper and lateral impressions on the ischial tuberosity

- groove on the posteromedial aspect of the tibia

Question 3

Directly posteriorly a robust expansion called the __________ passes proximally and laterally and blends with the posterior capsule and arcuate ligament from the lateral side

Answer 3

oblique popliteal ligament

Question 4

The nerve supply to the hamstring muscles

Answer 4

tibial branch of the sciatic nerve

Question 5

gracilis muscle, origin and attachment

Answer 5

• inferior pubic ramus

- long tendon that lies medial to the tendon of the semitendinosus

Question 6

gracilis muscle innervation

Answer 6

obturator nerve

Question 7

sartorius muscle, origin and attachment

Answer 7

• anterior superior iliac spine
• subsartorial canal
• inserting directly into the tibia, fibers blend with layer 1

Question 8

sartorius muscle innervation

Answer 8

femoral nerve

Question 9

semitendinosus muscle, origin and attachment

Answer 9

• ischial tuberosity

- medially on the surface of the semimembranosus

Question 10

Together the tendons of the sartorius, gracilis, and semitendinosus form the _______

Answer 10

pes anserinus

Question 11

The ______ lies superficially and covers the insertions of the gracilis and semitendinosus.

Answer 11

sartorius tendon expansion

Question 12

The semitendinosus inserts into the tibia just _____ to the gracilis

Answer 12

distal

Question 13

where is the most proximal point of insertion of the pes anserinus

Answer 13

19 mm distal and 22.5 mm medial to the apex of the tibial tubercle

Question 14

the function of the muscles that are inserted in the the pes anserinus

Answer 14

flex and internally rotate the knee

Question 15

adductor magnus, origin and attachment

Answer 15

• 2 parts: ischiopubic ramus (adductor portion) / tuberosity of the ischium (hamstring portion)
• adductor tubercle on the medial condyle of the femur

Question 16

adductor magnus innervation

Answer 16

• adductor portion –> obturator nerve

- hamstring portion –> sciatic nerve

Question 17

gastrocnemius muscle, origin and attachment

Answer 17

ORGIN
- lateral head –> lateral aspect of the lateral femoral condyle
- medial head –> popliteal surface of the femur / medial aspect of the medial femoral condyle
ATTACHMENT
- common tendon with the soleus, inserts into the tendo calcaneus

Question 18

plantaris muscle, origin and attachment

Answer 18

• lateral supracondylar line of the femur deep to the lateral head of the gastrocnemius
• Tendo calcaneus (medial side, deep to gastrocnemius tendon)

Question 19

soleus, origin and attachment

Answer 19

ORGIN
- posterior surface of the shaft and head of the fibula
- soleal line of the posterior surface of the tibia
ATTACHMENT
- deep surface of the Achilles tendon

Question 20

The gastrocnemius, plantaris, and soleus are innervated by

Answer 20

tibial nerve