Quizlet

Flashcards: Comparative Anatomy - Cat - Muscles - Back

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Serratus dorsalis superiorOrigin - First nine ribs. Insertion - Mid-dorsal raphe. Action - Draws ribs crainially.
Serratus dorsalis inferiorOrigin - Last four ribs. Insertion - Lumbar spinous process. Action - Draws ribs crainially.
Spinalis dorsiOrigin - Last four thoracic vertebrae. Insertion - Thoraco-cervical vertebrae. Action - Extends vertebral column.
Longissimus dorsiOrigin - Sacral and caudal vertebrae. Insertion - Trunk and cervical vertebrae. Action - Extends vertebral column.
iliocostalisOrigin - As separate muscle bundles from lower thoracic ribs. Insertion - Three ribs craniad to the origin of each bundle. Action - Draws ribs together.
Multifidus spinaeOrigin - 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.