bi231 Muscle worksheet.pdf - The Skeletal Muscles The...

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Action Bone of Origin Bone of Insertion Raises eyebrows and wrinkles forehead Frontal Bone Skin of the brow Closes mouth Maxillae and Mandible Lips Draws angle of mouth up and out Zygomatic Bone mouth Closes eye Margin of Orbit Eyelid Elevates the mandible Zygomatic Arch Mandible Elevates the mandible Temporal Bone Mandible Presses the cheek inward Maxillae and Mandible orbicularis oris Flexes and rotates the neck (also elevates the ribs) Sternum and Clavicle Mastoid Process Flexes the neck (also elevates the ribs) Cervical Vertebrae 1st Two Ribs Flexes the vertebral column and compresses the abdomen Pubis Lower Ribs and Xiphoid Flexes and rotates the vertebral column and also compresses the abdomen Lower Ribs Linea alba and Ilium Flexes and rotates the vertebral column and also compresses the abdomen Lumbar Vertebrae and Ilium Lower Ribs, Linea alba, Sternum Compresses the abdomen Lower Ribs, Ilium and Lumbar Vertebrae Linea Alba and Pubis Extends the vertebral column Ilium, Sacrum, Ribs, Vertebrae Ribs, Vertebrae, Base of Skull Extends the neck (also elevates the scapula) Cervical Vertebrae Scapula Flexes, adducts and medially rotates the arm at the shoulder Sternum and Clavicle Humerus Elevates the ribs (also moves the scapula anterior and inferior) Ribs Scapula Elevates the ribs Superior Rib Inferior rib Depresses the ribs Inferior rib Superior Rib Increases thoracic volume by pulling downward Xyphoid Process, Ribs, Lumber Vertebrae Central Tendinous Sheet The Skeletal Muscles: The following is a list of muscles you will be tested on for your last lab exam. They are catagorized by their actions. For each muscle you

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