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Shoulder girdle kine
Everything you need to know about the muscles that cross the shoulder girdle
Question | Answer |
---|---|
What kind of joint is the sternoclavicular joint? | Ball and socket 3dof |
What kind of joint is the acromioclavicular joint? | ball and socket 3dof |
How much of the movement in the arm comes from the shoulder girdle? | one third |
Bony arrangement for SC | poor |
Ligament arrangement for SC | fair |
muscular arrangement for SC | poor |
advantages of SC | location |
bony, ligament, and muscular arrangement for AC | poor! |
pectoralis minor | depression, protraction, downward rotation |
seratus anterior | dep, pro, up rot |
subclavius | dep, pro |
levator scapula | elev, retraction, down rot |
rhomboids | elev, retraction, down rot |
trapezius upper | elev |
trapezius middle | dep, retraction, up rot |
trapezius lower | dep, retraction, up rot |
F=ma | a larger mass requires more force making mass and force proportional as mass goes up, acceleration goes down, creating an inverse relationship |