MSK- knee anatomy Flashcards

1
Q

does the femur articulate with the fibula?

A

NO, the femur never articulates with the fibula

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2
Q

What is the largest and most complicated join in the body?

A

the knee joint

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3
Q

what does the knee consist of?

A

3 joints within a single synovial cavity

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4
Q

what 3 joints does the knee contain?

A
  1. medial condylar joint
  2. lateral condylar joint
  3. patellofemoral joint
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5
Q

what is the medial condylar joint?

A

Between the medial condyle of the femur and the medial condyle of the tibia

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6
Q

where is the lateral condylar joint located?

A

between the lateral condyle or the femur and the lateral condyle of the tibia

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7
Q

where is the patellofemoral joint located?

A

between the patella and the patellar surface of the femur

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8
Q

is the fibula directly involved in the joint?

A

no

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9
Q

what is one of the most frequently injured joints in the body?

A

knee joint

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10
Q

what kind of joint is the knee joint?

A

synovial hinge joint

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11
Q

what movements does the knee joint make?

A
  • mainly flexes and extends

- it has a rotational component

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12
Q

function of the parellofemoral joint?

A
  • articulation between the patella and femur

- main job is to increase the mechanical advantage of the quad muscle and protect the knee joint

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13
Q

what is the intercondylar eminence?

A
  • double pointed prominence on the proximal surface of the tibial plateau
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14
Q

where is the medial and lateral condyle of the tibia located?

A

proximal end of the bone just below the tibial plateau

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15
Q

where is the tibial plateau located?

- what 3 things does it include?

A

proximal end including the medial and lateral condyles and intercondylar eminance

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16
Q

where is the tibial tuberosity located?

- what attaches to it?

A

large projection at the proxial end and anteror side where the patellar tendon attaches

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17
Q

what is the patella?

- what does it sit within?

A

triangular shaped seasmoid bone within the quadriceps tendon

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18
Q

what is the crucuate ligament?

A
  • within the joint capsule
  • the cross
  • intracapsular ligaments
  • names for their attachments
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19
Q

anterior crucuate ligament location?

A
  • attaches to the anterior side of the tibia just medial to the medial meniscus
  • attaches to the posterior side of the femur
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20
Q

anterior cruciate ligament function?

A

prevents anterior translation of the tibia on the femur

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21
Q

posterior cruciate ligament location?

A
  • attaches to the posterior side of the tibia.

- attaches to the anterior femur

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22
Q

posterior cruciate ligament function?

A

prevents posterior translation of the tibia on the femur

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23
Q

Medial Collateral Ligament location?

- what is it attached to?

A

attached to the tibia and femur on the medial side of the knee joint.
attached to the medial meniscus, so injury to one can result in injury to both.

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24
Q

Lateral Collateral Ligament location?

A
  • attached from the femur to the fibula on the lateral side of the knee
  • Shorter and stronger than the MCL
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25
Q

deep layer of the MCL in continuous with?

A

medial meniscus

26
Q

what are the 2 most commonly torn ligaments of the knee?

A

MCL and ACL

27
Q

Biceps tendon and LCL relationship?

A

they share a common insertion onto head of fibula

28
Q

the LCL is seperated from the lateral meniscus by what?

A

popliteal tendon

29
Q

what is the meniscus?

A

medial and lateral meniscus are two half moon, wedge shaped fibrocartilage located on the superior tibia

30
Q

function if meniscus?

A

provide shock absorption in the knee

31
Q

what meniscus is more often torn?

A

medial

32
Q

what is the best imaging modality for menisci damage?

A

MRI

33
Q

when imaging the menisci what should you always do?

A

move the trx focal zones deeper

34
Q

capsule of the knee location?

A
  • surrounds the sides and posterior aspect of the joint

- on the frontal side the capsule is absent

35
Q

On the side of the patella the capsule in strengthened by what?

A

the tendons of vastus lateralis and vastus medialis

36
Q

what is the popliteal space?

A

area behind the knee that contains important nerves and blood vessels

37
Q

what make up the diamond shaped border of the popliteal space? (2 muscles)

A
  • hamstrings

- gastronemius

38
Q

what is the Pes Anserine muscle group made up of?

A

Sartorius, Gracilis and semiTendinosus (SGT)

39
Q

where does the Pes Anserine muscle group come from?

A

posterior to medial anterior knee, there is a bursa under the insertion

40
Q

what are the 5 knee extensors?

A
  • quadraceps femoris
  • Rectus femoris
  • Vastus lateralis
  • Vastus intermedius
  • Vastus medialis
41
Q

what is the quadraceps femoris?

A

the only extensors of the lower leg at the knee

42
Q

what is the only quad with orgion on pelvis?

A

rectus femoris

43
Q

what are the knee extensors antagonized by?

A

hamstrings

44
Q

what is the vastus laterals?

A
  • knee muscle

- spans the quad laterally, starts on the linea aspera and joins with the others at the patellar tendon

45
Q

what is the vastus intermedialis?

  • location
  • arises from
  • blends with
  • function
A
  • deep to the rectus femoris
  • arises from the anterior surface of the femur
  • blends with the other vasti muscles along its length
  • All extend the knee, only the rectus flexes the hip
46
Q

rectus femoris?

A

originates on inferior illiac spine and decends down the center of the thigh, most superficial muscle of quad

47
Q

what is the most superifical muscle of the quad?

A

rectus femoris

48
Q

Vastus medialis?

A

comes from the linea aspera and spans the thigh medially and joins with quads at patellar tendon

49
Q

Semitendinosus muscle?

A

longer and narrower distal tendon that moves to the anterior tibia with the grasillis and sartoris after spanning the posterior medial thigh

50
Q

Semimembranosus muscle?

A

runs down medial side of the thigh deep to the semitendinosus muscle and attaches to the medial condyle of tibia

51
Q

Biceps Femoris?

A
  • has two head and runs down the thigh laterally on the posterior side
  • The long head starts of the ischial tuberosity, the short head on the linea aspera
52
Q

Popliteus function?

A

muscle responsible for unlocking the knee or initiating knee flexion

53
Q

popliteus location?

- deep to?

A

on the posterior side of the knee in the poplitial space deep to the gastrocnemius

54
Q

muscles that produce flexion? (6)

A
  • biceps femoris
  • semitendinosus
  • semimembranosus
  • gracilis
  • sartorius
  • popliteus
55
Q

flexion is limited by what?

A

the contact of the back of the leg with the thigh

56
Q

extension muscle?

A

quadriceps femoris

57
Q

extension is limited by?

A

the tension of all the ligaments of the joint

58
Q

medial rotation muscles?

A
  • sartorius
  • gracilia
  • semiendinosus
59
Q

Magnetic resonance imaging(MRI scan)?

A
  • Using high-energy magnetic waves, an MRI scanner creates highly detailed images of the knee and leg
  • An MRI scan is the most-often used method of detecting ligament and meniscal injuries
60
Q

Arthrocentesis of the knee(joint aspiration)?

A
  • A needle is inserted into the joint space inside the knee, and fluid is drawn out.
  • Various forms of arthritis may be diagnosed through knee arthrocentesis.
61
Q

what is the shorter and stronger cruciate ligament?

A