KNEE JOINT Flashcards Preview

Anatomy (TOPNOTCH SUPPLEMENT) > KNEE JOINT > Flashcards

Flashcards in KNEE JOINT Deck (19):
1

ARTICULATION (knee joint)

Above: CONDYLES OF THE FEMUR

Below: CONDYLES OF THE TIBIA AND MENISCI

Front: LOWER FEMUR, PATELLA

2

Between femur and tibia

Synovial hinge joint

3

Between patella and femur

Synovial gliding joint

4

Nerve supply of knee joint

Femoral nerve

Obturator nerve

Common peroneal nerve

Tibial nerve

5

Movements of knee joint

FLEXION
Biceps femoris
Semitendinosus
Semimembranosus
Gastrocnemius
Gracilis
Sartorius
Popliteus

EXTENSION
Quadricep femoris

6

Encloses the knee joint

Except anteriorly (capsule deficient)

Synovial membrane pouches upward beneath quadriceps tendon

"Suprapatellar bursa"

CAPSULE

7

Extra capsular ligaments

Ligamentum patellae

Lateral collateral ligament

Medial collateral ligament

Oblique popliteal ligament

8

Intracapsular ligaments

Cruciate ligaments: anterior and posterior cruciate ligaments

9

Preverns FORWARD sliding of the tibia on the femur

Posterior displacement of the femur on tibia

LAX during FLEXION

"APEX" ligament

Attaches to the Anterior aspect of tibia and courses Posteriorly and EXternally to attach to the lateral condyle of femur

Anterior cruciate ligament

10

Prevents BACKWARD sliding of the tibia on the femur

Anterior displacement of the femur on tibia

LAX during EXTENSION

"PAIN" ligament

attaches to the Posterior aspect of tibia and courses Anteriorly and INternally to attach to the medial condyle of femur

Posterior cruciate ligament

11

Unhappy triad of O'Donoghue

Anterior cruciate ligament

Medial collateral ligament

Medial meniscus

12

3 most commonly inured structures (knee joint)

The terrible triad

Tibial collateral ligament

Medial meniscus

Anterior cruciate ligament

13

Bloe to the lateral aspect of the knee

May injure the tibial collateral ligament

The attached medial meniscus may also be torn

14

Blow to the anterior aspect of the flexed knee

May tear only the ACL

15

Synovial joint

Stabilized laterally by BICEPS and GASTROCNEMIUS tendons, ILIOTIBIAL TRACT and FIBULAR COLLATERAL LIGAMENTS

Stabilized MEDIALLY by SARTORIUS, GRACILIS, GASTROCNEMIUS, SEMINITENDINOSUS and SEMIMEMBRANOSUS MUSCLES and TIBIAL COLLATERAL LIGAMENT

Knee Joint

16

Forward sliding of the tibia on the femur due to rupture of the ANTERIOR CRUCIATE LIGAMENT

ANTERIOR DRAWER SIGN


Patients with a torn ACL exhibit ANTERIOR DRAWER SIGN, in which the TIBIA MAY BE DISPLACED ANTERIORLY FROM THE FETUS IN THE FLEXED KNEE

17

Backward sliding of the tibia on the femur caused by rupture of the POSTERIOR CRUCIATE LIGAMENT

POSTERIOR DRAWER SIGN

18

Tibia is bent or twisted LATERALLY

Collapse of the lateral compartment of the knee and RUPTURE OF THE MEDIAL / TIBIAL COLLATERAL LIGAMENT

Knock knee (GENU VALGUM)

19

Tibia is bent MEDIALLY

Collapse of the medial compartment of the knee and RUPTURE OF THE LATERAL / FIBULAR COLLATERAL LIGAMENT

BOWLEG (GENU VARUM)