Knee

Question 1

ACL runs from

Answer 1

Intracondylar eminence anteriorly to medial aspect of lateral condyle

Question 2

ACL is tight in

Answer 2

EXTENSION

Question 3

PCL runs from

Answer 3

postierior intracondylar eminence posteriorly to lateral aspect of medial condyle

Question 4

PCL is tight in

Answer 4

FLEXION

Question 5

ACL resists

Answer 5

Ant tibial translation
Knee hyperextension
IR

Question 6

ACL often torn in

Answer 6

Hyperextension
Valgus
Rotational
forces

Question 7

MCL/LCL are tight in

Answer 7

EXTENSION

Question 8

MCL runs

LCL runs

Answer 8

inferiorly and anteriorly
From medial femoral epicondyle to the tibia

LCL - from lateral femoral epicondyle to the fibular head

Question 9

ACL full return post op

Answer 9

6 months to 1 yr

Question 10

PCL often torn with

Answer 10

Varus
Twisting
MVA with tibia on dashboard
Fall onto flexed knee

Question 11

ACL - if surgical repair with hamstring -

Answer 11

NO RESTRICTIVE HAMSTRING exercises for 6 wks

Question 12

LCL torn with

Answer 12

Varus stress contact

Question 13

MCL torn with

Answer 13

Valgus stress contact

Often rotation force

Question 14

Patellar surface on femur is larger ___

Answer 14

Laterally!

Patella tends to glide more laterally during knee extension

Question 15

Tibial condyles - which is larger

Answer 15

Medial!

50% larger and has 3x more cartilage than lateral

Question 16

Medial meniscus is what shape and what attaches

Answer 16

C shaped

Attaches with MCL and Semimembranosus

Question 17

Lateral meniscus is what shape and what attaches

Answer 17

O shaped

Attaches with PCL and popliteus

Question 18

Meniscus - repair vs. removal

Answer 18

Repair has a longer recovery than removal

Question 19

Meniscus and blood flow - Meniscal tears can heal if

Answer 19

They are localized to the outer/peripheral 1/3 rim/edges
This is the only area that receives blood supply

Outer 1/3 injury can heal without surgery
Inner and middle 1/3 will require menisectomy

Question 20

Triad

Answer 20

MCL
Medial meniscus
ACL

Question 21

Tear meniscus - what injury

Answer 21

Rotation/cutting movement
Deep flexion
Degneration

If forced into hyperextension - can be medial meniscus

Question 22

With valgus (knock knee) - where is tension and where is compression

Answer 22

Medial - tens
Lateral - compression

Mechanical axis is displaced laterally

Question 23

With varus force - where is the tension and where is compression

Answer 23

Medial - compression
Lateral - tens

Mechanical axis is displaced medially

Question 24

With genu recurvatum where is the tension and where is the compression

Answer 24

Ant - compression
Post - tension

Mechanical axis is displaced ant

Question 25

Bowstring effect is what

Answer 25

ITB and other forces tend to draw patella laterally | can lead to chondromalacia

Question 26

Open chain

Answer 26

Tibia on femur Concave on convex SAME

Question 27

Closed chain

Answer 27

Femur on tibia Convex on concave OPP

Question 28

Screw home mechanism

Answer 28

With extension, ACL is tight and pulls knee into slight ER Couples motions: EXT of knee with ER of tibia FLEX of knee with IR of tibia

Question 29

Largest joint in the body?

Answer 29

KNEE?

Question 30

OA in the knee is most common where

Answer 30

medially (from varus knee?)

Question 31

TKA

Answer 31

Need 90 flex before dc from hospital | Knee ext is priority

Question 32

Quad tendon rupture

Answer 32

Usually knee flexed to 90 when ruptures

Question 33

Painful knee may require what with rehab

Answer 33

Strengthening of HIP to decrease load/forces through knee

Question 34

Ottawa Rules for referring for radiograph

Answer 34

``` Hx of trauma in 55+ Tenderness at head of fibula Tenderness at patella Inability to flex knee 90 deg Inability to bear weight for 4 steps immed after injury ```

Question 35

Patellar tendon rupture - exercise

Answer 35

No active extension for 6 wks (only passive) | 6 to 12 month recovery