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level: Neck Muscles & Vertebral Column

Questions and Answers List

Question	Answer
Origin:Anterior side of vertebrae Insertion:Base of skull Action:Flex head and neck	Flexors
Origin:Posterior side of vertebrae Insertion:Base of skull Action:extend head and neck	Extensors
Origin:Sternum and mdeial part of clavicle Insertion:Mastoid process and nuchal lines Action:Individually rotate head;together flex neck	Sternocleidomastoid
Origin:Posterior surface of skull and upper vertebral column(C7-TI2 Insertion:Clavicle,acromion process,and scapular spine Action:Extends and laterally flexes neck	Trapezius
Origin:Sacrum,ilium,vertebrae,and ribs Insertion:Ribs,Vertebrae,and skull Action:Extends vertebral columns,maintains postures	Erector spinae
What are the three columns of erector spinae?	Iliocostalis Longissimus Spinalis
Origin:Vertebrae Insertion:Vertebrae Action:Extend vertebral column and help bend vertebral column laterally.	Deep back muscles