Posterior Core Muscles

12345
Across
  1. 4. insertion is ribs 9-12 of inferior borders
  2. 5. origin is C7-T1 of spinous process
Down
  1. 1. broad flat muscle occupying most of the back, origin at iliac crest & spinous processes of all lower thoracic and lumbar vertebrae
  2. 2. Insertion is spine and acromion at scapula
  3. 3. Origin is spinous processes of T9-T12 thoracic vertebrae
  4. 5. origin is T2-T5 of spinous process