Knee region Bones Joint Muscles Artery & Nerves. Movements at the Knee Flexion / Extension – Occurs in sagittal plane Rotation: internal / external -

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Presentation transcript:

Knee region Bones Joint Muscles Artery & Nerves

Movements at the Knee Flexion / Extension – Occurs in sagittal plane Rotation: internal / external - Occurs only when the knee is flexed

MOVEMENTMUSCLESNERVESEGMENT ExtensionRectus femorisFemoralL 2, 3, 4 Vastus MedialisFemoralL 2, 3, 4 Vastus LateralisFemoralL 2, 3, 4 Vastus IntermediusFemoralL 2, 3, 4 FlexionSemimembranosusSciaticL 5 S 1 SemitendinosusSciaticL 5 S 1 Biceps FemorisSciaticL 5 S 1,2 SartoriusFemoralL 3, 4 GracilisObturatorL 3, 4 GastrocnemiusTibialS 1,2 UnlockingPopliteusTibialL 4, 5 S 1 Outward RotationBiceps FemorisSciaticL 5 S 1,2 Inward RotationSartoriusFemoralL 3, 4 GracilisObturatorL 3, 4 SemitendinosusSciaticL 5 S 1 PRIME MOVERS OF THE KNEE

Quadriceps Rectus femoris Vastus medialis Vastus lateralis Vastus intermedius

Quadriceps origin

Vastus intermedius

Vastus medialis Vastus lateralis

Rectus femoris

Quadriceps insertion

Quadriceps action Extension of knee Walking: helps hip flexion Strong anti-gravity

Flexion of knee Main flexors: Hamstrings Sartorious Gracilis Minor flexors: Popliteus Plantaris Gasterocnemius

Hamstrings

Hamstrings action Extension of hip: when flexion of knee is resisted by quadriceps Flexion of knee: when extension of hip is resisted by hip flexors Medial/lateral rotation of the knee joint: when the knee is flexed

Medial/lateral rotation Hamstrings

Sartorious

Gracilis

Pes anserinus

Flexion of knee Main flexors: Hamstrings Sartorious Gracilis Minor flexors: Popliteus Plantaris Gasterocnemius

Popliteus knee unlocker

Gasterocnemius

Popliteal fossa

Popliteal Fossa: Is the diamond shape and lying behind the knee joint 1. Superolaterally: Biceps Femoris m. 2. Superomedially: Semimembranosus & Semitendinosus m s. 3. Inferolaterally: Lat. Head of Gastrocnemius & Plantaris m s. 4. Inferomedially: Med. Head of Gastrocnemius m. 5. Floor: Popliteal surface of Femur, Capsul of Knee Joint, Popliteal m. 6. Roof: Skin, Superficial Fascia and contents, Deep Fascia A) Situation: B) Boundaries:

Popliteal fossa (Borders)

Popliteal fossa: floor

Popliteal fossa (contents)

Popliteal artery

Popliteal vein

Main nerve brunches

Cutaneous nerves

Arrangement: Nerves & vessels

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