Knee Muscular Anatomy

Knee Flexors

Semitendinosus Origin Insertion Action Nerve Supply Palpation

Semimembranosus Origin Insertion Action Nerve Supply Palpation

Origin Insertion Action Nerve Supply Palpation Biceps Femoris

Gastrocnemius Origin Insertion Action Nerve Supply Palpation

Origin Insertion Action Nerve Supply Palpation Gracilis

Sartorius Origin Insertion Action Nerve Supply Palpation

ITB Origin Insertion Action Nerve Supply Palpation

Popliteus Origin Insertion Action Nerve Supply Palpation

Knee Extensors

Rectus Femoris Origin Insertion Action Nerve Supply Palpation

Origin Insertion Action Nerve Supply Palpation Vastus Lateralis

Origin Insertion Action Nerve Supply Palpation Vastus Medialis

Origin Insertion Action Nerve Supply Palpation Vastus Intermedius

Flexion Semitendinosus Semimembranosus Biceps Femoris Gastrocnemius Gracilis Sartorius ITB (> 30° Flexion) Popliteus

Extension Rectus Femoris Vastus Lateralis Vastus Medialis Vastus Intermedius ITB ( < 30° Flexion)

Tibial External Rotation Biceps Femoris ITB

Tibial Internal Rotation Popliteus (Open Chain) Semitendinosus Semimembranosus Gracilis Sartorius