Muscles pelvis, hip, thigh, & knee PDF

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Flex hip Extend hip Medial rotation Lateral rotation Muscle

Action

Pelvis

Quadratus Lumborum

Acts with back extensors to extend and laterally flex the vertebral column

Unilaterally elevate pelvis

Flex the hip

Posteriorly tilt pelvis

Iliopsoas

If muscle is short - will pull the lumbar spine into extension and anteriorly tilt the pelvis

If muscle is short, will pull the lumbar spine into extension and anteriorly tilt the pelvis Gluteus Maximus

Extend hip Laterally rotate hip

Posteriorly tilt pelvis (when acting synergistically with lower abdominals) If abs are weak and hip is limited in extension range, pelvis will tilt anteriorly with spinal extension

Erector Spinae & Multifidus

Act bilaterally to Posteriorly tilt pelvis

Abdominal Muscles

Rotate the pelvis

Posteriorly tilt pelvis

Gluteus M  edius

Hip Abductor

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Anterior fibers: flex & medially rotate Posterior fibers: extend & laterally rotate

Gluteus Minimus

Hip Abductor

Tensor Fascia Lata

Flex thigh Abduct thigh

Medially rotate thigh Assists in stabilizing the knee in extension Hamstrings Semitendinosus

Extend hip Flex knee

Semimembranosus

Extend hip Flex knee

Biceps Femoris Long Head

Extend hip Flex knee

Biceps Femoris Short Head

Flex knee

Anterior Thigh Muscles Sartorius

Flex thigh Abduct thigh Laterally rotate thigh Think: tailor sitting

Quadriceps Rectus Femoris

Flex hip Extend knee

Vastus Lateralis

Extend knee

Vastus Medialis

Extend knee

Vastus Intermedius

Extend knee

Pectineus

Flex hip Adduct hip Assist with medial rotation

Medial Compartment

Adductor Longus

Adduct hip CHECK

Adductor Brevis

Adduct hip

Adductor Magnus

Adduct hip

Gracilis

Adduct hip Flex knee

Obturator Externus

Hip lateral rotation

Deep Lateral Rotators Piriformis

Lateral rotation - deep

Superior Gemella

Lateral rotation - deep

Obturator Internus

Lateral rotation - deep

Inferior Gemella

Lateral rotation - deep

Quadratus Femoris

Lateral rotation - deep

Obturator Externus

Lateral rotation - deep

External iliac artery → femoral artery ● Occurs as it crosses under the inguinal ligament and enters the femoral triangle Femoral artery continues through the adductor hiatus → popliteal artery

Deep femoral artery

Posterior thigh musculature

Femoral nerve

Anterior compartment of thigh ● Gives rise to cutaneous nerves that supply the anterior thigh and medial leg

Sciatic nerve

Posterior thigh muscles ● Branches supply all the muscles of the leg and foot as well as cutaneous supply to the leg and foot

Popliteal Fossa - diamond shaped area ● Bounded superiorly - inferior borders of hamstring muscles

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Bounded inferiorly - 2 head of gastrocnemius muscle Contents: ○ Tibial nerve ○ Popliteal vein ○ Popliteal artery - deepest...