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There are over 600muscles
in your body.
The broad trapeziusisamong the most recognizable
of the whole lot!
Lets take a look!
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The trapezius is namedfor its shape, which
resembles a trapezoid.
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Each trapeziusextends
across one half of the back.
Together they cover these regions:
Posterior part of the neck
Shoulders
Upper back
Factoid
:Muscle
imbalance
scan
occurw
henall
threesection
softhe
trapeziu
saren
otdeve
lopedcorrec
tly.
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The trapezius is part ofthe posterior thoraxgroup.
The other muscles of this group:
Levator scapulaeSerratus posterior superiorSerratus posterior inferiorLevatores costarum brevis
Levatores costarum longiRhomboideus majorRhomboideus minorQuadratus lumborum
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Hold it right there!Quick review.
Muscles tend to have more massat the origin.
The structure that the originis attached to tends
to be moved by the muscle contracting.
We mark origins in red on the skeleton &
use 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.
Originsand insertionsare where the muscle attachesto a structure,either a bone or other tissue.
Insertions are marked in blue
on the skeleton & use these
cool blue pins.
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The trapezius hasmultiplepoints of
origin.
The first is the
occipital bone.
See how the red paint and
pins meet the muscle?
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The others are across the thoracicvertebrae of the spine.
The muscle attaches to the spinousprocesses of T01 - T12.
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The trapezius insertsonto the clavicleand the
scapula.
The insertion points on the
scapula are the acromionand the scapular spine.
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The trapezius is innervated by the
accessory cranial nerve(CN XI).
The cranial nervesare a group
of 12 paired nerves that connect the
muscles and organs of the head and
body directlyto the brain.
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Here is the trapezius with all
the muscles that attach to
the scapulaor clavicle.
Factoid:The
muscles
inthe
shoulder
regionconn
ectbone
s
oftheax
ialtobon
esofthe
append
icularske
leton.
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The trapezius actswith
other muscles to moveyour head, neck, and
shoulders.
This is Head/Neck Extension.The trapezius works with muscles of
the thoraxand spineto tilt your
headback.
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Scapula upward rotation
The trapeziusacts to help
the scapula:
Depress
Elevate
Adduct
Rotate
These actions help
move the upperlimbs.
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Watchthe trapezius elevate
the scapula!
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All the images and text in this eBook camefrom Visible Bodys Muscle Premium appan
encyclopedic anatomical reference for humanmusculature.
MUSCLEPREMIUM
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, andAndroid.
Site Licenses are available for Muscle Premium. Learn more here.
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