The Anatomy of the Knee: Muscles and Tendons

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Presentation transcript:

The Anatomy of the Knee: Muscles and Tendons

Quadriceps 4 Muscles Rectus Femoris Vastus Intermedius (Underneath Rectus Femoris) Vastus Medialis Vastus Lateralis Location: Anterior thigh Action: Knee EXTENSION

Rectus Femoris

Vastus Intermedius Underneath Rectus Femoris

Vastus Medialis

Vastus Lateralis

Quadriceps vs. Patellar Tendon Quadriceps Muscle Quad Tendon Patella Patellar Tendon Tibial Tuberosity Quadriceps muscles all ultimately insert (end) at the tibial tuberosity Quadriceps Muscle Quadriceps Tendon Patella Patellar Tendon Tibial Tuberosity

Hamstrings 3 Muscles Semimembranosus Semitendinosus Biceps Femoris Location: Posterior Thigh Action: Knee FLEXION

Hamstrings

Pes Anserine Conjoined tendon of three muscles Sartorius (Hip Flexor) Gracilis (Adductor) Semitendinosus (Hamstring) Location: Anterior medial aspect of tibia

Pes Anserine Function: These three muscles all help with knee FLEXION Adds stability to medial knee

Iliotibial Band (IT) Band Long tendon of the TFL and part of gluteus maximus Function: Adds stability to the lateral knee

Iliotibial Band (IT) Band