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Origins, Insertions, and Actions of Various Muscles Test #4
n/a
11
Anatomy
Undergraduate 1
12/03/2009

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Term
Sternocleidomastoid
Definition
Origin: Sternum and Clavice * Insertion: Mastoid Process * Action: Flex and Extend Arm
Term
Deltoid
Definition
Origin: Acromion of Scapula * Insertion: Deltoid Tuberosity of Humerus * Action: Abduct the arm
Term
Pectoralis Major
Definition
Origin: Clavice, Sternum, and costal cartilage 2-6 * Insertion: Greater tubercle of the humerus * Action: Adduct and medially rotate arm.
Term
Pectoralis Minor
Definition
Origion: Ribs 2-5 * Insertion:Coracoid Process of Scapula * Action: Adduct the scapula
Term
Serratus Anterior
Definition
Origin: Superior 8-9 ribs * Insertion: Vertebral border of scapula * Action: Abducts the scapula
Term
Diaphragm
Definition
Origin: xiphoid process to the 12 rib * Insertion: central tendom * Action: Breathing
Term
Latissimus dorsi
Definition
Origin: Spines of T7-T12 * Insertion: Intertubercular sulcus of humerus * Action: Extends and medially rotates arm
Term
External Oblique
Definition
Origin: Inferior 8 ribs * Insertion: Iliac Crest * Action: Compress abdomen
Term
Internal Oblique
Definition
Origin: Iliac Crest * Insertion: Cartilage of ribs 8-12 * Action: Compress abdomen
Term
Transversus abdominis
Definition
Origin: Iliac Crest * Insertion: Xiphoid process * Action: Compress Abdomin
Term
Rectus Abdominis
Definition
Origin: Pubic Crest * Insertion: Rib Cartilages 5-7 to xiphoid process * Action: Flex Vertebral Column
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