Lab 7 - Gluteals & Posterior Thigh

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Gluteus Maximus Origin

-Posterior sacrum
-Posterior ilium: sacrotuberous ligament & superior gluteal line

Gluteus Maximus Insertion

-Gluteal tuberosity of femur
-Via iliotibial tract to lateral condyle of tibia

Gluteus Maximus Action

-Extension of femur
-External rotation of extended thigh

Gluteus Maximus Nerve

Inferior gluteal nerve

Gluteus Maximus Blood

Superior/inferior gluteal artery

Gluteus Medius Origin

Posterior ilium between superior and middle gluteal lines

Gluteus Medius Insertion

Greater trochanter of femur

Gluteus Medius Action

-Abduction of femur
-Internal rotation of thigh

Gluteus Medius Nerve

Superior gluteal nerve

Gluteus Medius Artery

Superior gluteal artery

Gluteus Minimus Origin

Posterior ilium between middle and inferior gluteal lines

Gluteus Minimus Insertion

Anterior surface of greater trochanter

Gluteus Minimus Action

-Abduction of femur
-Internal rotation of thigh

Gluteus Minimus Nerve

Superior gluteal nerve

Gluteus Minimus Blood

Superior gluteal artery

Tensor Fascia Lata Origin

Anterior portion of iliac crest

Tensor Fascia Lata Insertion

Via iliotibial tract to lateral condyle of the tibia

Tensor Fascia Lata Action

-Stabilizes extended knee
-Flexion/abduction/internal rotation of femur

Tensor Fascia Lata Nerve

Superior gluteal nerve

Tensor Fascia Lata Blood

Superior gluteal artery

Piriformis Origin

Anterior sacrum

Piriformis Insertion

Greater trochanter of femur

Piriformis Action

External rotation of femur

Piriformis Nerve

Anterior rami S1 & S2

Piriformis Blood

Gluteal arteries

Quadratus Femoris Origin

Ischial tuberosity

Quadratus Femoris Insertion

Quadrate tubercle

Quadratus Femoris Action

External rotation of femur

Quadratus Femoris Nerve

Nerve to quadratus femoris

Quadratus Femoris Blood

Gluteal arteries

Obturator Internus Origin

Internal (posterior) surface of obturator membrane and rim of obturator foramen

Obturator Internus Insertion

Greater trochanter of femur

Obturator Internus Action

External rotation of femur

Obturator Internus Nerve

Nerve to obturator internus

Obturator Internus Blood

Gluteal arteries

Obturator Externus Origin

External (anterior) surface of obturator membrane and rim of obturator foramen

Obturator Externus Insertion

Greater trochanter of femur

Obturator Externus Action

External rotation of femur

Obturator Externus Nerve

Obturator nerve

Obturator Externus Blood

Gluteal arteries

Biceps Femoris Origin

Long head - ischial tuberosity
Short head - linea aspera

Biceps Femoris Insertion

-Lateral aspect of head of fibula
-Lateral condyle of tibia

Biceps Femoris Action

Both heads: Flexion of knee, external rotation of flexed knee
Long head: Extends hip

Biceps Femoris Nerve

Long head: Tibial division of sciatic nerve
Short head: Common peroneal division of sciatic nerve

Biceps Femoris Blood

Femoral profunda artery

Semimembranosus Origin

Ischial tuberosity

Semimembranosus Insertion

Posterior medial tibial condyle

Semimembranosus Action

-Flexion of knee
-Internal rotation of flexed knee
-Extension of hip

Semimembranosus Nerve

Tibial division of sciatic nerve

Semimembranosus Blood

Femoral profunda artery

Semitendinosus Origin

Ischial tuberosity

Semitendinosus Insertion

Via pes anserinus to proximal medial tibial shaft

Semitendinosus Action

-Flexion of knee
-Internal rotation of flexed knee
-Extension of hip

Semitendinosus Nerve

Tibial division of sciatic nerve

Semitendinosus Blood

Femoral profunda artery

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