Emily Delello Salene Sheridan Know Your KNEE Emily Delello Salene Sheridan

The knee joint is 3 joints in1 The Tibiofemoral joint is a hinge joint permitting flextion and extension. The Femoralpatellar joint is a plane joint where the patella glides across the distal end of the femur during knee flextion. Structurally it is a bicondylar joint allowing some rotation when the knee is partially flexed and when the knee is extending.

Femur

Tibia

Fibula

Patella Left and Right???

Patella

MUSCLES Of the Leg

Rectus Femoris Origin: Anterior Inferior iliac spine Insertion : Tibial Tuberosity Action: Hip flexion, Knee extension Innervation: Femoral Nerve Vascular supply: Lateral circumflex artery

Lateral Circumflex Femoral Artery

Vastus intermedialis Origin: Anterior femur Insertion: Tibial tuberosity via patellar tendon Action: Knee extension Innervation: Femoral nerve Vascular supply: Lateral circumflex femoral artery

Vastus lateralis Origin: Lateral aspera Insertion: Tibial tuberosity via patellar tendon Action: Knee extension Innervation: Femoral nerve Vascular supply: Lateral circumflex femoral artery

Vastus Medialis Origin: Linea aspera Insertion: Tibial tuberosity via patellar tendon Action: Knee extension Innervation: Femoral nerve Vascular supply: Circumflex femoral artery

Vastus Lateralis Vastus Medialis

Bicep Femoris Origin: Long head of the Ischial tuberosity. Short head the lateral lip of linea aspera Insertion: Fibular head Action: Long head, extends hip and flexes knee. Short head, flexes knee Innervation: Long head, sciatic nerve. Short head, common peroneal nerve Vascular supply: Inferior gluteal artery

Semimembranous Origin: Ischial Tuberosity Insertion: Posterior surface of medial condyle of tibia Action: Extend hip and flex knee Innervation: Sciatic nerve Vascular supply: Inferior gluteal artery

Semimembranosus Semitendinosus

Semitendoninosus Origin: Ischial tuberosity Insertion: Anteromedial surface of Proximal tibia Action: Extend hip and flex knee Innervation: Sciatic nerve Vascular supply: Deep femoral

Popliteus Origin: Lateral condyle of femur Insertion: Posteriorly on medial condyle of tibia Action: Initiates knee flexion Innervation: Tibial nerve Vascular Supply: Popliteal artery

gastrocnemius Origin: Medial and lateral condyles of femur Insertion: Posterior calcaneus Action: Knee flextion, ankle plantar flextion Innervation: Tibial nerve Vascular supply: Popliteal artery

Lateral Head Medial Head of Gastrocnemius

Ligaments A ligament is a tough band of fibrous tissue that connects bone to bone or bone to cartilage and supports and strengthens joints.

KEY 1= Quadriceps femoris tendon 2=Patellar Ligament 3= Oblique popliteal ligament 4=arcuate popliteal ligament 5=Tibial collateral ligament 6=Fibular collateral ligament 7=Anterior cruciate ligament 8=Posterior cruciate ligament 9=Transverse ligament

1 2

4 4

7 5 6 3 8

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2

9

Bursae-A bursa (plural bursae) is a small fluid-filled sac lined by synovial membrane with an inner capillary layer of viscous fluid (similar in consistency to that of a raw egg white). It provides a cushion between bones and tendons and/or muscles around a joint. This helps to reduce friction between the bones and allows free movement. Bursae are filled with synovial fluid and are found around most major joints of the body.

Bursae 1=Prepatellar Bursa 2=Deep Infrapatellar Bursa 3=Suprapatellar Bursa 4=Subcutaneous Infrapatellar Bursa

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4

Cartilage Firm, whitish, flexible connective tissue found in various forms in the larynx, in the external ear, and in the articulating surfaces of... A particular structure made of this tissue.

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