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The Knee Joint

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Erika Campbell

on 7 November 2013

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Transcript of The Knee Joint

photo credit Nasa / Goddard Space Flight Center / Reto Stöckli
The Knee Joint
Type of Joint
~ The knee is a synovial joint because it contains synovial fluid. Therefore the joint moves freely
~ The Knee is a hinge joint
~ The convex part of the femur fits into the concave portion of the tibia
~ This allows for movement on only one plane
Landmarks of the
Knee Joint
Muscles of the
Knee Joint
How the Knee Joint Functions
~ The knee joint works on the Sagittal (medial) Plane

~ The knee is able to be flexed and extended.

~ The Knee is the largest joint in the human body
Common Knee Injuries
By Erika Campbell
Muscles that flex
the Knee Joint
Muscles that Extend the Knee Joint
Origin: Lateral and medial condyles or the femur

Insertion: Attaches to a common tendon, which fuse with the tendon of the soleus to form the calcaneal tendon. This tendon inserts on the calcaneus
*Helps the flex the knee
Origin: Anterior superior iliac spine

Insertion: medial surface of tibia

Origin: inferior ramus of pubis

Insertion: below the medial tibial condyle
Origin: lateral condyle of the femur

Insertion: posterior side of the medial condyle of tibia
Hamstring Group
~ Biceps Femoris
~ Semimembranosus
~ Semitendinosus
Origin: anterior inferior iliac spine

Rectus Fremoris
Vastus Lateralis
Origin: linea aspera and greater trochanter
Vastus Intermedius
Vastus Medialis
Origin: anterior shaft of femur
Origin: medial aspect of linea aspera
The Quadriceps insert on: tibial tuberosity of tibia

Medial Collateral Ligament
~ medial epicondyle of femur
~ medial condyle of tibia
Lateral Collateral Ligament
~ lateral epicondyle of femur
~ Head of fibula
Anterior Cruciate Ligament
Posterior Cruciate
~ distal femur
~ intercondyloid eminence
of tibia
~ medial condyle of femur
~ posterior intercondylar
area of tibia
Ligament Injuries
ACL Injuries:
~ The ligament is overstretched and tears or ruptures
~ Caused by the knee bending in the wrong direction by being pushed too far backward or twisting
~ Symptoms include a popping sound, swelling, pain, knee gives way, lack of stability
~ Treatment includes exercise rehab or surgery

MCL Injuries:
~ Any damage, such as a tear to the ligament
~ A sudden twist by force through the outside of the knee
~ Symptoms include inner knee pain, swelling, instability, inability/ difficulty to bend knee
~ Treatment involves knee bracing, exercise and allowing healing to occur for 3-4 months

Knee Sprain:
~ Overstretching of any knee ligaments that tears some of the fibers
~ It's caused by a sudden force or twist involving the knee
~ Symptoms include knee pain, swelling, instability, inability/ difficulty bending or straightening knee
Cartilage Injuries

Meniscus Tear:
~ Tear in the lining of the cartilage
~ Can be caused by sudden force or twisting of the knee. It can be a gradual tearing of the cartilage as well
~ Symptoms include knee pain, swelling, instability, difficulty moving the knee
Knee Cap Injuries
Dislocated Patella:
~ This occurs when the patella is pushed out of place
~ Causes are normally from high impact injury
~ Symptoms include pain, difficulty moving, deformed looking leg
~ Treatments may involve exercise, knee brace or surgery

Patella Fracture:
~ Occurs when the patella breaks
~ Caused by a strong force at the front of the leg
~ Symptoms include pain, swelling and difficulty moving the knee joint
~ Treatment includes surgery, exercises, knee brace or cast
Compressed Tibia Plateau Fracture
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