Quadratus lumborum arises from the posterior part of the iliac crest and extends to the rib XII and lumbar vertebrae IIV. It unilaterally bends the trunk to the side and bilaterally pulls the 12th rib down and assists in expiration.
The Muscles Of The Trunk Human Anatomy And Physiology Lab Bsb 141
Because skeletal muscles move the insertion closer to the immobile origin fixator muscles assist in movement by holding the origin stable.
. If you lift something heavy with your arms fixators in the trunk region hold your body upright and immobile so that you maintain your balance while lifting. Human anatomy scientific study of the morphology of the adult humanIt is subdivided into gross anatomy and microscopic anatomyGross anatomy also called topographical anatomy regional anatomy or anthropotomy is the study of anatomical structures that can be seen by unaided. The following outline is provided as an overview of and topical guide to human anatomy.
There are two muscles in the deep or posterior group.
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