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Erector Spinae Muscle group

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Question
Answer
What muscles make up the Erector Spinae Group?   Spinalis, Longissimus, Iliocostalis  
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What Erector Muscle is in the middle of the 3?   Longissimus  
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What Erector Muscle is the smallest of the 3 and lies closest to the spine?   Spinalis  
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What action would you have a person do to contract the lower fibers of the Erector group?   Raise and lower feet slightly  
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What Erector Muscle originates on the common thoracis tendon and the TVP's of the upper five throacic vertebrae?   Longissimus  
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What Erector muscle inserts on the Spinous processes of upper thoracic and cervicals (except c1), and superior nuchal line of occiput?   Semispinalis Capitis  
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If you were to flex the spine, what would that action do to the iliocostalis muscle? And why?   lengthen it. Because the Iliocostalis is part of the Erector group and they extend the vertebral column  
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What group of muscles originate on the sacrum and TVPsof lumbar through cervical vertebrae   Multifidi  
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What muscle originates on the TVPs of lumbar through cervical vertebrae and inserts on the spinous processes of lumbar vertebrae through second cervical vertebra   Rotatores  
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The common tendon (lumborum), posterior surface of ribs 1-12 (thoracis and cervicis) is the origin of what Erector muscle?   Iliocostalis  
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Which Erector muscle originates and inserts on spinous processes?   Spinalis  
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What would happen to the multifidi muscles if you rotated to the same side?   They would lengthen  
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How would you access the Rotatores muscles if your person was prone?   Find the TVPs and direct your fingers towards the vertebrae  
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What would happen to the Rotatores muscles if you rotated to the opposite side?   They would shorten because they originate on the TVPs of lumbar through cervical and insert on the spinous processes causing them to shorten with the rotation.  
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The TVPs of lumbar vertebrae 1-3 and posterior surface of ribs 6-12, posterior surface of ribs 1-6, TVPs of lower cervicals is the insertion for what muscle?   Iliocostalis  
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What is the unilateral action of the Multifidi and the Rotatores?   Rotate the vertebral column to the opposite side.  
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Name all of the muscles that perform extension of the spine   Erector group, transversospinalis group, Quadratus Lumborum  
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