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Hint
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Answer
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Intercostals Origin
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inferior part of rib above
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Intercostals Insertion
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superior part of rib below
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Intercostals Function
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respiration and moves ribs superiorly and inferiorly
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External Oblique Origin
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lower ribs (bottom 6-8)
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External Oblique Insertion
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iliac crest and linea alba
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External Oblique Function
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trunk flexion and side flexion and rotation and compresses abdomen for respiration
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Internal Oblique Origin
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Thoracolumbar fascia and Iliac crest and Inguinal ligament
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Internal Oblique Insertion
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Lower ribs and linea alba
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Internal Oblique Function
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trunk flexion and side flexion and rotation and compresses abdomen
for respiration
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Rectus Abdominis Origin
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pubis bone
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Rectus Abdominis Insertion
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Distal sternum and Costal cartilages of the ribs
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Rectus Abdominis Function
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Trunk flexion and Aids in expiration/ compresses abdomen
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Diaphragm Origin
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Distal sternum and Inner surface of lower rib cage and Lumbar vertebrae bodies
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Diaphragm Insertion
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central tendon of diaphragm
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Diaphragm Function
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respiration (contracts down to open lungs)
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Rhomboid (Major/Minor) Origin
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Spinous process of CVII to TV
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Rhomboid (Major/Minor) Insertion
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Medial border of scapula
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Rhomboid (Major/Minor) Function
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Retract and elevate scapula
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Erector Spinae Origin
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Sacrum and Iliac crest and Spinous process/ Transverse process of all cervical, thoracic, and lumbar vertebrae and Angles of all 12 ribs
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Erector Spinae Insertion
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Mastoid process of Temporal bone and Posterior surface of occipital bone Spinous process/ Transverse process of all cervical, thoracic and lumbar vertebrae. and Angles of all 12 rib
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Erector Spinae Function
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Act as the primary extensors of vertebral column and head. and Acting unilaterally, can side flex vertebral column.
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