LEA Lab Quiz 3 Muscles

Question 1

Origin of the Bicep Femoris

Answer 1

Long Head: inferomedial aspect of posterior ischial tuberosity (w/ semitendoinosus)
Short Head: inferior 2/3 of lateral lip of linea aspera and supracondylar line

Question 2

insertion of the bicep femoris

Answer 2

lateral aspect fibular head
fibular collateral ligament (LCL)
lateral tibial condyle

Question 3

innervation of the bicep femoris

Answer 3

Long head: Tibial nerve (of sciatic)

short head: Common fibular (of sciatic)

Question 4

function of bicep femoris

Answer 4

extend thigh (not the short head- doesn't cross the hip)
flex knee (leg)
laterally rotate the knee

Question 5

Origin of Semitendinosus

Answer 5

sacrotuberous ligament

Inferiomedial asepct of posterior ischial tuberosity (w long head)

Question 6

insertion of the semitendinosus

Answer 6

proximal medial tibia (pes anserinus) [palpable here when contracted)

Question 7

function of the semitensinosus

Answer 7

extend thigh

flex and medially rotate the knee

Question 8

innervation of the hamstring muscles

Answer 8

tibial part of sciatic

Question 9

origin of semimembranosus

Answer 9

superolateral aspect of posterior ischial tuberosity

Question 10

insertion of semimembranosus

Answer 10

• groove on posterior aspect of medial tibial condyle

- fascia over popliteus muscle

Question 11

function of semimembranosus

Answer 11

extend the thigh

flex and medially rotate leg (tendon palpable)

Question 12

popliteus origin

Answer 12

lateral femoral condyle (popliteal groove)
lateral meniscus
knee joint capsule

Question 13

popliteus insertion

Answer 13

superior to soleal line (tibia)

Question 14

nerve to popliteus

Answer 14

tibial nerve

Question 15

blood supply to the popliteus

Answer 15

posterior tibial and medial inferior genicular.

Question 16

function of the popliteus

Answer 16

unlocks the knee by laterally rotating the femur on the tibia or medially rotating the tibia on the femur
pulls meniscus posteriorly.

Question 17

Fibular collateral ligament (LCL) attachments

Answer 17

lateral epicondyle to apex of fibular head (at bicep femoris insertion)

Question 18

Tibial collateral ligament (MCL) attachments

Answer 18

medial epicondyle to medial tibial condyle and tibial shaft

Question 19

oblique popliteal ligament attachments

Answer 19

attaches to lateral femoral condyle

extension of semimembranosus tendon to blend with posterior capsule

Question 20

Arcuate Popliteal ligament attachments

Answer 20

apex of fibular and divides into 2 limbs:

• medial limb: over popliteus and blends with oblique popliteal
• lateral limb: blends with lateral capsule.

Question 21

Anterior Cruciate ligament (ACL) attaches

Answer 21

anterior intercondylar fossa of tibia to lteral side of medial femoral condyle in intertrochanteric notch

Question 22

Posterior Cruciate ligament (PCL) attaches

Answer 22

posterior intercondylar fossa of tibia to lateral side of medial femoral condyle in intercondylar notch

Question 23

Transverse Ligament of the knee attaches

Answer 23

anterior horn of medial meniscus and anterior margin of lateral meniscus

Question 24

Meniscofemoral ligaments span from

Answer 24

posterior horn of lateral meniscus to the lateral aspect of medial femoral condyle

Question 25

Meniscotibial Ligaments attach

Answer 25

menisci periphery to tibial plateau (also anchors horns of menisci to tibia)