Body Wall Muscles
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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| Pectoralis Minor | anterior, superior surfaces of rib 3-5 | coracoid process of scapula
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| Pectoralis Major | cartilages of ribs 2-6 body of sternum and inferror medeal protion of clavical. | crest of grater tubacle and lateral lip of intertubericular groove of humerus
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| Cervical Longus colli | Subvertebral | Flexes the neck and rotates it to the opposite side, flexes the head.
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| Sternalis | Ventral | Nothing, assists with rib movement when present.
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| Intercostals | Lateral | Move and depress the ribs.
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| Diaphragm | Lateral | Increases the volume of the thoracic cavity in inspiration.
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| Thoracic Longus colli | Subvertebral | Flexes the neck and rotates it to the opposite side.
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| Rectus abdominis | Ventral | Flexes the lumbar vertebral column, helps compress the abdominal cavity.
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| External oblique | External Lateral | Helps compress the abdominal cavity, compress and depress the lower thoracic cavity to aid in expiration, rotates trunk to opposite side.
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| Internal oblique | Intermediate(middle) lateral | Strong compressor of the abdominal cavity, rotates trunk to the same side.
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| Transversus abdominis | Internal Lateral | Compresses the abdominal cavity.
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| Quadratus lumborum | Internal Lateral(posterior) | Laterallly flexes the vertebral column, extends lumbar verebrae. Fixes 12th rib to stabilize diaphragm attachments during inspiration.
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| Psoas major | Subvertebral | Extends the lumbar vertebral column (deepening the lumbar curve) to maintain posture. Powerful flexor of the hip.
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| Diaphragm | Xiphoid process cartilages of ribs 4-10 and anterior surfaces of lumbar vertebrae. | cnetral tendinous sheet.
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| External oblique | External and inferior borders of rib 5-12 | linea alba and iliac crest
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| Internal oblique | lumbodorsal fascia and iliac crest | Inferior fibs, xiphoid process and linea alba.
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| Transversus abdominis | Cartilages of ribs 6-12 Iliac crest and lumbodorsal fascia. | Linea alba and pubis
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Created by:
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