Pectoral Girdle Muscles Flashcards
What is the Location of Subclavius
Inferior to Medial 1/2 of Clavicle
What is the Origin of Subclavius
Rib 1 - Costal Cartilage
What is the Insertion of Subclavius
Clavicle - Inferior Middle 3rd
What are the Actions of Subclavius
Anchors and Depresses Clavicle, with Clavicle fixed Elevates Rib
What is the Innervation of Subclavius
Subclavian Nerve
What is the Location of Serratus Anterior
Lateral aspect of Thoracic wall
What are the Origins of Serratus Anterior
Ribs 1-8 (9) - External surface
What is the Insertion of Serratus Anterior
Medial Border of Scapula - Anterior surface
What is the Action of Serratus Anterior
Protracts Scapula and Holds it against the Thoracic wall
What is the Innervation of Serratus Anterior
Long Thoracic Nerve
What is the Location of Pectoralis Minor
Deep to Pectoralis Major
What is the Origin of Pectoralis Minor
Anteromedial surface of Ribs 3-5
What is the Insertion of Pectoralis Minor
Coracoid Process
What are the Actions of Pectoralis Minor
Protracts and Stabilizes Scapula (I moves towards O with scapula fixed), Draws the Ribcage up (O moves toward I)
What is the Innervation of Pectoralis Minor
Medial Pectoral Nerve (some branches of Lateral Pectoral Nerve)
What is the Location of Pectoralis Major
Inferior to Clavicles
What are the Origins of Pectoralis Major
Clavicular Head - Anterior aspect/Medial 1/3 of Clavicle
Sternocostal Head - Anterior surface of Sternum, Ribs 1-6
Abdominal Head - External Oblique Muscle Aponeurosis
What is the Insertion of Pectoralis Major
Lateral Lip of Bicipital Groove
What are the Actions of Pectoralis Major
3 Heads - Medial Rotation, Adduction
Clavicular Head - Flexion of G/H Joint
Sternocostal Head - Extends Humerus at G/H Joint from Flexed Position
What is the Innervation of Pectoralis Major
Lateral Pectoral Nerve
Lower Fibres - Medial Pectoral Nerve
