Muscles of the Trunk and Abdomen
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Trapezius | how | upper ribs | you
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| Erector spinae | extends vertebrae and ribs, maintains erect posture | sacrum, ilium, lumbar and thoracic vertebrae, ribs | ribs, cervical and thoracic vertebrae
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| External intercostals | elevates and draws ribs together-insperation | inferior border of a rib, external surface | superior border of a rib below, external surface
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| Internal intercostals | draws ribs together, depresses thorax (ribs) -experation | superior border of a rib, internal surface | inferior border of rib above, internal surface
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| Diaphragm | pulls central tendon down, increasing size of thoracic cavity, inspiration | xiphoid process, costal cartilages of last six ribs, and lumbar vertebrae | central tendon
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| External oblique | compresses abdomen, lateral rotation | lower eight ribs | iliac crest, Linea Alba
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| Internal oblique | compresses abdomen, lateral rotation | iliac crest | Linea Alba, costal cartilage of last three or four ribs
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| Transversus abdominis | compresses abdomen | inguinal ligament, lumbar fascia, and costal cartilage of last six ribs | Linea Alba, and Pubic Crest
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| Rectus abdominis | flexes and rotates vertebral column | Pubic Crest and Symphysis Pubis | Costal cartilage of fifth to seventh ribs and xiphoid process
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| Trapezius | Rotates Scapula, raises scapula, pulls scapula medially, or pulls scapula and shoulder downward, extend head, laterally flexes head and neck | occipital bone, cervical and thoracic vertebrae | Clavicle, Acromion and Spinous process of Scapula
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Created by:
Drbrown2346
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