Thigh and knee Flashcards
What is the anteversion of the femoral neck?
15-20 degrees
What is the articularis genu?
Small muscle on the anterior aspect of the distal femur deep to vastus intermedius
O: anterior surface of distal femur, deep to vastus intermedius
I: synovial membrane of knee
I: femoral nerve
A: pulls the suprapatellar bursa superiorly during knee extension, preventing impingement of the bursa between patellar and femur

What innervates adductor Magnus?
Obturator (posterior branch) & sciatic (tibial portion)
What are the origins and insertions of biceps femoris?
O:
Long head: ischial tubeosity (with semitendinosus)
Short head: lateral linea aspera, lateral supracondylar ridge
I: fibular head, LCL, lateral tibial condyle

What comprises the conjoint tendon of the thigh?
Long head of biceps femoris & semitendinosus
Name the insertion sites of semimimbranosus:
Posterior medial tibial condyle
posterior capsule and posterior horn of medial meniscus
oblique popiteal ligament
posterior oblique ligament
popliteus aponeurosis
What are the borders of the adductor canal? Its contents?
Lateral: vastus medialis
Medial: sartorius
Floor: adductor longus/Magnus
Contents:
Femoral artery and vein
saphenous nerve
nerve to vastus medialis
***Note that the picture below has the vessels passing through the adductor hiatus of adductor magnus with a large portion of the muscle medially and a smaller portion laterally

What vessels are included in the Cruciate anastamosis? Where is it located?
1st perforating branch of the profunda femoris (main)
Medial femoral circumflex artery
Lateral femoral circumflex artery
Inferior gluteal artery
Located at the inferior margin of quadratus femoris

What degree is the tibial slope?
8-10 degrees posterior
What is the average thickness of the largest sesamoid bone in the body?
23-25mm Note: in TKA, it should not be cut to a thickness of less than 12-15mm as this increases the risk of patellar fracture
Describe the anatomic axis of the femur and tibia?
A line that runs down the intramedullary canal of the femur and tibia, respectively
How do you measure Q-angle? What are normal values in men and women?
What are 4 ways to increase Q-angles in TKA? (this is bad and should be avoided!)
Angle between a line from ASIS to the patellar centre and another extending proximally from tibial tubercle through patellar centre Normal: Men: 14 degrees Women: 17 degrees
In TKA you must ensure you dont:
- internally rotate the femoral component
- internally rotate the tibial component
- medialize the femoral component
- lateralize the patellar component

Name the 12 ligaments of the knee:
there are more than 12:
ACL
PCL
LCL
MCL
MPFL
Arcuate ligament
Oblique popliteal ligament
Retinacular ligament
Coronary ligament
Wrisberg ligament
Humphrey ligament
Transverse ligament
posterior oblique ligament
popliteofibular ligament
(ligamentum mucosum is not a ligament - misnomer - it is a plica)
Which ligaments of the knee contribute to the fibrous capsule of the knee posteriorly?
Medially:
- Oblique popliteal ligament: semimimbranosus to posterior wall of capsule
Laterally:
- Arcuate ligament: Y-shaped fibres from fibular head
- popliteal muscle to the posterior capsule
- LCL contributes to joint capsule

Which ligaments of the knee have attachments to the menisci (5)?
- MCL
- Coronary ligament: peripheral menisci to capsule/tibia
- Transverse: aka anterior intermeniscal ligament
- Wrisberg: behind PCL from posterior lateral meniscus to medial femoral condyle
- Humphrey: in front of PCL from posterior lateral meniscus to medial femoral condyle
Which parts of the ACL and PCL are tight in flexion? Extension?
- PCL
- AL
- PM
- **Remeber PAL (PCL has AL bundle)
- ACL
- AM
- PL
Tight in flexion: PCL: anterolateral ACL: anteromedial
Tight in extension: PCL: posteromedial ACL: posterolateral
When is the ACL tightest?
In extension
Name the layers of the medial aspect of the knee and each layer’s contents:
What are the medial layers of the knee:
Layer 1
- Sartorius
- fascia
- patellar retinaculum
**gracilis, semitendinosis, and saphenous nerve run between layer 1 and 2
Layer 2
- superficial MCL
- posterior oblique ligament
- semimembranosis
- MPFL
Layer 3
- deep MCL
- capsule
- coronary ligament
What are the layers of the lateral aspect of the knee and their contents?
What are the lateral layers of the knee (according to Orthobullets)
Layer 1:
- - IT tract
- - biceps femoris
Common Peroneal nerve lies between layers 1 and 2
Layer 2:
- - Patellar retinaculum
Layer 3:
Superficial:
- LCL
- fabellofibular ligament
- ALL
****Lateral geniculate artery runs between deep and superficial layers
Deep:
- popliteus tendon
- Arcuate ligament
- popliteofibular ligament
- coronary ligament
- capsule
What part of the tibial plateau is concave and convex?
Medial is concave
Lateral is convex
What is the insertion of the IT band?
Gerdys tubercle
What is the insertion of the patellar tendon
tibial tubercle
What is the usual deformity of a proximal one third tibia fracture
valgus and procurvatum
(from Pes and extensor mechanism)
What attaches at the fibular head?
LCL
Biceps femoris tendon

























