Study Knee Joint (Kinesiology) Flash Cards

 
Pile Management Card
Knee Joint (Kinesiology)

loading
What are the extrinsic factors that can cause excessive lateral tracking of the patella?
-LARGE Q ANGLE

-WEAK EXTERNAL ROTATORS OR ABDUCTORS OF THE HIP

-EXCESSIVE PRONATION OF THE FOOT
What are the intrinsic factors that can cause excessive lateral tracking of the patella?
-IMBALANCE OF FORCES BETWEEN THE VASTUS MEDIALIS OBLIQUUS (VMO) AND VASTUS LATERALIS

-TIGHT ILIOTIBIAL BAND OR LATERAL PATELLAR RETINACULUM

-DECREASED SLOPE OF THE LATERAL FACET ON THE INTERCONDYLAR GROOVE OF THE FEMUR
True/False

The larger the Q-angle (genu valgum), the LARGER the lateral pull on the patella?
TRUE
True/False

The Q angle indicates the relative MEDIAL force that is applied to the patella during a quadriceps contraction?
FALSE

LATERAL
How many degrees should a normal Q angle have?
20 DEGREES

THIS REFLECTS THE NORMAL GENU VALGUS POSTURE OF THE KNEE
True/False

In order to get a maximus stretch of the rectus femoris we must have a posterior pelvic tilt?
TRUE
What is the most proper way to stretch the rectus femoris?
FLEX THE KNEE/EXTEND THE HIP
When a person is in an uncorrected Genu recurvatum, what structure will be most affected?
TIGHT POSTERIOR CAPSURE
What are the primary functions of the Menisci?
-ACT AS SHOCK OBSORBERS FOR THE KNEE
-INCREASE SURFACE AREA OF JOINT CONTACT, THEREFORE REDUCING JOINT PRESSURE
-IMPROVE JOINT CONGRUENCY
-FACILITATE NORMAL JOINT ARTHROKINEMATICS
How does the "Terrible Triad" injury occur?
KNEE IS FULLY EXTENDED WITH A LARGE ROTATIONAL AND VALGUS-PRODUCING FORCE. FOOT IS PLANED FIRMLY INTO THE GROUND WHEN THIS OCCURS
What is the "Terrible Triad"?
A VALGUS PRODUCING FORCE OF THE KNEE THAT WILL INJURE THE ACL, MCL, AND MEDIAL MENSICUS
What are the primary functions of the PCL?
-RESISTS POSTERIOR TRANSLATION OF THE TIBIA RELATIVE TO A FIXED FEMUR. (OPEN CHAIN PERSPECTIVE)

-RESIST ANTERIOR TRANSLATION OF THE FEMUR RELATIVE TO A FIXED TIBIA. (CLOSED CHAIN PERSPECTIVE)
What are the primary functions of the ACL?
-RESISTS ANTERIOR TRANSLATION OF THE TIBIA RELATIVE TO A FIXED FEMUR. (OPEN CHAIN PERSPECTIVE)

-RESIST POSTERIOR TRANSLATION OF THE FEMUR RELATIVE TO A FIXED TIBIA. (CLOSED CHAIN PERSPECTIVE)
True/False

PASSIVE knee extension is often avoided after anterior cruciate ligament (ACL) reconstruction?
FALSE

ACTIVE
What is the movement of the patella when the knee goes from flexion to extension?
MEDIAL-LATERAL-MEDIAL
When the knee is flexed to 20 degrees, approximately where is the patella located?
LATERAL
When the knee is flexed to 135 degrees, approximately where is the patella located?
LATERAL
When the knee if flexed to 90 degrees, Approximately where is the patella located?
MEDIAL
What part of the meniscus can repair itself and why?
THE RED ZONE AND RED WHITE ZONE.

MORE BLOOD IS IN THIS AREA
If the femur were to roll to far anteriorly, what ligament is likley to suffer the most damage?
PCL
If the femur were to roll posteriorly, what ligament is likely to suffer the most damage?
ACL
When are the cruciate ligaments not in contact?
DURING LATERAL ROTATION
When do the cruciate ligaments contact one another?
DURING MEDIAL ROTATION
What ligaments form a 4 bar cross linkage model?
-ACL
-PCL
These ligaments are considered to be intra-articular?
-ACL
-PCL
-MCL
Cruciate ligaments are named by what?
THEIR TIBIAL ATTACHMENTS
Describe the PCL?
-PREVENTS EXCESSIVE POSTERIOR TIBIAL TRANSLATION IN AN OCK
-MUCH STRONGER THAN ACL
-INJURED WITH HYPER-FLEXION FORCES
-DASH BOARD INJURIES
This ligament is injured with hyperflexion forces?
PCL
True/False

The ACL is much stronger than the PCL?
FALSE

PCL IS MUCH STRONGER
When does the PCL become taut?
DURING KNEE FLEXION
Describe the ACL?
-NAMED BY IT'S TIBIAL ATTACHMENT
-ISOMETRY (ALWAYS TAUT)
-PREVENTS EXCESSIVE ANTERIOR TIBIAL TRANSLATION IN AN OCK
-COMMONLY INJURED AS A RESULT OF DECLERATION FORCES
This ligament is always taut?
ACL
What is the closed packed position of the knee joint?
FULL EXTENSION
How is the LCL best palpated?
FIGURE 4 POSITION
What is the attachment of the MCL?
MEDIAL MENISCUS
True/False

The MCL is known as an intra-articular ligament?
TRUE
Which ligament is part of the knee capsule and which isn't?
-LCL (NOT PART OF CAPSULE

-MCL (PART OF CAPSULE)
True/False

The LCL is an extra-articular ligament?
TRUE
Excessive valgus will cause injury to what ligament?
MCL
Describe genu valgum?
LATERAL MENISCUS IS SUBJECTED TO COMPRESSION FORCES AS THE MCL IS STRETCHED
A patient has genu varum. Where is the excessive weight bearing?
-MEDIAL ASPECT OF THE KNEE
-MEIDAL MENISCUS SUBJECT TO COMPRESSION FORCES
Genu varum?
BOWLEGGED
True/False

The MEDIAL TIBIAL PLATEAU is convex?
FALSE

LATERAL TIBIAL PLATEAU IS CONVEX
True/False

The amount of articular cartilage that lines the back of the patella is some of the thickest in the body?
TRUE
The patella is AKA what?
A SESMOID BONE
The LATERAL FACET is higher than the MEDIAL FACET to keep the joint for dislocating?
TRUE
True/False

The FIBULA is part of the knee joint?
FALSE
How much ROM flexion/extension does the knee joint have?
135 DEGREES FLEXION
0 DEGREES EXTENSION
What does the knee joint rely on for stability?
-LIGAMENTS
-MENISCI
-SURROUNDING MUSCULATURE
The knee joint sacrifices ____________ for ______________?
SACRIFICES JOINT STABILITY FOR MOBILITY
What motions can the knee joint move in?
-FLEXION/EXTENSION
-ROTATION (ONLY WHEN FLEXED TO 90 DEGREES)
-FRONTAL PLANE VARUS/VALGUS
Why is the knee considered a modified hinge joint?
IT HAS 3 DEGREES OF MOTION
What kind of joint is the knee?
MODIFIED HINGE JOINT
Place this card into pile: