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The Lateral Rotators
http://www.visiblebody.com/


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Have you eversat with yourlegs splayed?How about in abuttery position?Ever jumped and

thrown your legsaway from yourbody? If so, youveworked the lateral

rotator muscles!
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They do pretty much whatit says on the tin:

they rotate the hip joint

laterally , or away from the center of the body.

They also facilitate other

motions of the hip, includingadduction and extension .


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The lateral rotators include: the superior gemellus,inferior gemellus, piriformis, obturator externus,

obturator internus, and quadratus femoris.


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Insertions are marked in

blue on the skeleton with these cool blue pins.

Before we go any further:Lets review attachment points.

Muscles tend to have more mass at theorigin.

The structure that the origin is attached

to tends to be moved by the musclecontracting . Muscle Premium marks origins in red on

the skeleton with these nifty red pins.

The opposite end of the origin is the insertion .

It tends to move while the structure of the origin is stabilized .

Origins and insertions are where the muscle attaches to a structure,either a bone or other tissue.


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The superior gemellus and inferior gemellusattach to the greater trochanter of the femur

and the ischium of the pelvis.

Factoid: Gemellus

is the diminutiveof the Latin wordgeminus, meaningtwin.

For you astrologyfans, you mayrecognize the wordgemini!


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The quadratus femoris is a quadrilateral-shapedmuscle that can also be

categorized as a muscle of the gluteal region.


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The piriformis is the only lateralrotator that attaches to the sacrum .

It originates on the frontof the sacrum betweenS01 -- S04 anteriorsacral foramina.

It inserts on the upperborder of the greater

trochanter.


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The obturator externus externally rotates the thighand stabilizes the pelvis.


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The obturator internus lies deep to the gluteus

maximus.It laterally rotates the thighwhen extended and abducts

the thigh when exed.


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The next time youre stretching your legs out or hunkeringdown to sit in a buttery pose,spare some thanks for yourawesome lateral rotators!


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All the images and text in this eBook camefrom Visible Bodys Muscle Premium appanencyclopedic anatomical reference for humanmusculature.

M USCLE P REMIUM

Content in the app includes:

600+ muscles, 200+ bones, peripheral nerves, andligaments all rendered in interactive 3D, as well as dozens

of interactive muscle action animations.Functionality that allows you to rotate, zoom in/out, pan,hide, and add structures to see the anatomy from anyangle. Customize and save views.

Dozens of quizzes to test your knowledge.

Muscle Premium is available for iOS , PC , Mac , and Android .

Site Licenses are available for Muscle Premium. Learn more here .
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