Spine and Thorax Flashcards
Quadratus Lumborum Action
Unilaterally:
Laterally tilt the pelvis
Laterally flex the vertebral column to the same side
Bilaterally:
Fix the last rib during forced inhalation and exhalation
Quadratus Lumborum Origin
Posterior iliac crest
Quadratus Lumborum Insertion
Last rib and transverse processes of first through fourth lumbar vertebrae
Abdominal Mucles
Rectus Abdominis
External Oblique
Internal Oblique
Transverse Abdominis
Rectus Abdominis Action
Flex the vertebral column
Tilt pelvis posteriorly
Rectus Abdominis Origin
Pubic crest, pubic symphysis
Rectus Abdominis Insertion
Cartilage of fifth, sixth, and seventh rib and xiphoid process
External Oblique Action
Unilaterally:
Laterally flex vertebral column to the same side
Rotate vertebral column to the opposite side
Bilaterally:
Flex the vertebral column
Compress abdominal contents
Internal Oblique Action
Unilaterally:
Laterally flex vertebral column to the same side
Rotate vertebral column to the same side
Bilaterally:
Flex the vertebral column
Compress abdominal contents
Transverse Abdominis Action
Compress abdominal contents
Diaphragm Action
Draw down the central tendon of the diaphragm
Increase the volume of the thoracic cavity during inhalation
Intercostals Action
External Intercostals:
Draw the ribs superiorly (increasing space) assist with inhalation
Internal Intercostals:
Draw the ribs (decrease space) assist in exhalation
Serratus Posterior Superior Action
Elevate the ribs during inhalation
Serratus Posterior Inferior Action
Depress the ribs during exhalation
Intertransversarii Action
Unilaterally:
Laterally flex the vertebral column to the same side
Bilaterally:
Extend the vertebral colimn
