2 Written Questions

1. Origin - As separate muscle bundles from lower thoracic ribs. Insertion - Three ribs craniad to the origin of each bundle. Action - Draws ribs together.
2. Origin - As separate muscle bundles from lumbar transverse processes. Insertion - On spinous process one vertebrae craniad to origin of each bundle. Action - Extends from vertebrae column.

2 Multiple Choice Questions

1. Origin - Sacral and caudal vertebrae. Insertion - Trunk and cervical vertebrae. Action - Extends vertebral column.
   1. Spinalis dorsi
   2. iliocostalis
   3. Multifidus spinae
   4. Longissimus dorsi
2. Origin - First nine ribs. Insertion - Mid-dorsal raphe. Action - Draws ribs crainially.
   1. Serratus dorsalis superior
   2. Spinalis dorsi
   3. Multifidus spinae
   4. Serratus dorsalis inferior

2 True/False Question

1. Spinalis dorsi → Origin - Last four thoracic vertebrae. Insertion - Thoraco-cervical vertebrae. Action - Extends vertebral column.
   

   True        False

2. Serratus dorsalis inferior → Origin - Last four ribs. Insertion - Lumbar spinous process. Action - Draws ribs crainially.
   

   True        False