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A&PII Erector Muscle

Erector Spinae Muscle group

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