Anatomy of Movement- muscles in pelvis, thigh, and knee

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1

Superior Gemellus

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O= External surface of ischium

I= Medial surface of the greater trochanter of the femur

A=Externally rotates, abducts the hip

2

Inferior Gemellus

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O= Proximal part of the ischial tuberosity

I= Medial surface of the greater trochanter of the femur

A=Externally rotates, abducts the hip

3

Gracilis

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O= Inferior ramus of the pubis

I= Medial shaft of the tibia via the pes anserine tendon

A= adducts+ flexes the hip, flexes+ internally rotates the knee

4

Quadratus Femoris

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O= Lateral part of the ischial tuberosity

I= Between greater and lesser trochanter of the femur

A=Externally rotates the hip

5

Adductor Magnus

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O= Inferior ramus of the pubis, ramus of the ischium, and ischial tuberosity

I= medial lip of the linea aspera of the femur, medial supercondlye line, and adductor tubercle

A=Adducts the hip, flexes the hip (upper fiber), extends the hip (lower fibers)

6

Adductor Brevis

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O= outer surface of the inferior ramus of the pubis

I= Pectineal line and the proximal part of the medial lip of the linea aspera of the femur

A=Adducts, flexes, externally rotates the hip

7

Adductor Longus

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O= Between the pubic crest and the symphysis

I= Middle one-third of the medial lip of the linea aspera of the femur

A= Adducts, flexes the hip

8

Gluteus Minimus

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O= External surface of the ilium between the anterior and posterior gluteal lines

I= Anterior border of the greater trochanter of the femur

A= Abducts, internally rotates, slightly flexes the hip

9

Gluteus Maximus

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O= Posterior iliac crest, sacrum and sacrotuberous ligament

I= Greater trochanter of the femur, gluteal tuberosity, and lateral tibial condyle via the iliotibial band

A=Extends, externally rotates the hip, (upper fubers) abducts the hip and (lower fibers) adducts the hip

10

Gluteus Medius

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O= External surfaces of the ilium between the anterior and posterior gluteal line

I= Lateral surface of greater trochanter of the femur

A=Abducts the hip, (anterior fibers) flexes and internally rotates the hip, (posterior fibers) extends and externally rotates the hip

11

Obturator Externus

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O= Pubis and ischium, superior and inferior rami

I= Trochanteric fossa of the femur

A=Externally rotates the hip

12

Sartorius

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O= Anterior, superior iliac spine (ASIS)

I= Medial shaft of the tibia via the pes anserine tendon

A=Flexs, abducts, externally rotates the hip + flexes and internally rotates the knee

13

Psoas

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O= Transverse processes, lateral bodies, and corresponding intervertebral disks of T12-L5

I= Lesser trochanter of the femur

A=Flexes and exterally rotates the hip

14

Illiacus

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O= Iliac fossa ala of sacrum

I= Lesser trochanter of the femur

A=Flexesand externally rotates the hip

15

Tensor Fasciae Latae

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O= Anterolateral lip of the iliac crest

I= Lateral condyle of the tibia via the iliotibial band

A=Flexes, abducts and internally rotates the hip

16

Obturator Internus

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O= Inferior surface of obturator membrane of ischium

I= Medial surface of the greater trochanter of the femur

A=Externally rotates and abducts the hip

17

Pectineus

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O= Superior ramus of the pubis

I= Pectineal line of the femur

A=Adducts and flexes the hip

18

Piriformis

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O=Anterior surface of sacrum

I= superior border of greater trochanter of the femur

A= externally rotates and abducts the hip

19

Vastus Intermedius

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O=Proximal two-thirds of anterior shaft of the femur

I= Tibial tuberosity via the patellar tendon

A= Extends the knee

20

Vastus Lateralis

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O=Greater trochanter of the femur, gluteal tuberosity, and proximal lateral lip of the linea aspera

I= Tibial tuberosity via the patellar tendon

A= extends the knee

21

Vastus Medialis

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O=Intertrochanteric line and medial lip of linea aspera of the femur

I= Tibial tuberosity via the patellar tendon

A= Extends the knee

22

Biceps Femoris

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O= LONG HEAD: ischial tuberosity

O= SHORT HEAD: lateral lip of linea aspera

I= head of the fibula

A= Externally rotates the hip, and externally rotates and flexes the knee

23

Rectus Femoris

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O=Anterior, inferior iliac spine (AIIS)

I= Tibial tuberosity via the patellar tendon

A= Flexes the hip and extends the knee

24

Popliteus

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O=Laternal femoral condyle

I= Proximal posterior surface of the tibia

A= Flexes, internally rotates the knee

25

Semitendinosus

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O=Ischial tuberosity

I= Medial tibial shaft via the pes anserine tendon

A= Extends and internally rotates the hip and flexes and internally rotates the knee

26

Semimembranosus

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O=Ischial tuberosity

I=Posteromedial portion of medial tibial condyle

A= Extends and internally rotates the hip and flexes and internally rotates the knee


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