Stephen J. Schueler, M.D.

Overview Incidence Symptoms Evaluation Treatment specialist Home Care pain in adults pain in children using a cane using a walker using crutches warning signs Outlook Underlying Cause Anatomy

Knee Bruise Anatomy

To better understand a knee contusion, it helps to understand the anatomy of the knee joint.

Three bones come together at the knee joint:

  • Femur:
    • Thighbone
    • Articulates with hip joint above and knee joint below
    • The femur and tibia form the major portion of the knee joint,
  • Tibia:
    • Thick bone in the front of the lower leg or shin
    • The tibia supports all of the body's weight below the knee joint.
  • Patella:
    • Kneecap
    • The patella protects the front of the knee joint.
    • Connected by tendons above and below

Knee Tendons
The tendons are strong fibrous bands that connect the muscles to bone.

The knee tendons include:
  • Quadriceps tendon:
    • Attaches the quadriceps muscle to the kneecap
  • Patellar tendon:
    • Attaches the patella to the tibia
  • Popliteus tendon:
    • Extends from the outer bottom surface of the femur and travels diagonally behind the knee to attach to the inner upper surface of the tibia.
  • Hamstring tendons:
    • Attach the hamstring muscles to the tibia
  • Calf tendons:
    • Attach the calf muscles to the femur

Knee Ligaments
Strong fibrous bands, called ligaments, support the knee. Injuries to the knee ligaments are common.

The knee ligaments include:
  • Lateral collateral ligament:
    • Stabilizes the knee from stress applied to the sides of the knee
  • Medial collateral ligament:
    • Stabilizes the knee from stress applied to the sides of the knee
  • Posterior cruciate ligament:
    • Stabilizes the knee from stress applied to the front or back of the knee
  • Anterior cruciate ligament:
    • Stabilizes the knee from stress applied to the front or back of the knee

Knee Cartilage
Cartilage is a smooth, firm layer of tissue that lines all of the joints in the body. There are two c-shaped discs of cartilage that line the inside of the knee. They keep the knee easy to move and also stabilize the knee during range of motion.

The knee cartilages include:
  • Medial meniscus
  • Lateral meniscus

Last Updated: Dec 20, 2010 References
Authors: Stephen J. Schueler, MD; John H. Beckett, MD; D. Scott Gettings, MD
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PubMed Knee Bruise References
  1. Beiner JM, Jokl P. Muscle contusion injuries: current treatment options. J Am Acad Orthop Surg. 2001 Jul-Aug;9(4):227-37. [11476532]
  2. Berg E. Deep muscle contusion complicated by myositis ossificans (a.k.a. heterotopic bone). Orthop Nurs. 2000 Nov-Dec;19(6):66-7. [11899311]
  3. Centeno CJ, Freeman M, Elkins WL. A review of the literature refuting the concept of minor impact soft tissue injury. Pain Res Manag. 2005 Summer;10(2):71-4. [15915248]
  4. Guzman J, Yassi A, Cooper JE, Khokhar J. Return to work after occupational injury. Family physicians' perspectives on soft-tissue injuries. Can Fam Physician. 2002 Dec;48:1912-9. [12520791]
  5. Tull F, Borrelli J Jr. Soft-tissue injury associated with closed fractures: evaluation and management. J Am Acad Orthop Surg. 2003 Nov-Dec;11(6):431-8. [14686828]
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