Pectoral Region Muscles Anatomy PDF

Made with Xodo PDF Reader and Editor Pectoral Region ( lecture)  Made with Xodo PDF Reader and Editor Pectoral Region Definition Content Applied Anatomy ...

Made with Xodo PDF Reader and Editor Pectoral Region ( lecture)  Made with Xodo PDF Reader and Editor Pectoral Region Definition Content Applied Anatomy  Made with Xodo PDF Reader and Editor DEFINITION 3 The pectoral region is the anterior aspect of the thorax (chest). The muscles of this region are related to the upper limb (thoraco- appendicular).  Made with Xodo PDF Reader and Editor CONTENT Presentation title 4  Muscles 1. Pectoralis major 2. Pectoralis minor 3. Subclavius Fascia: Clavipectoral Fascia  Made with Xodo PDF Reader and Editor 5 What is the origin and insertion of Pectoralis major?  Made with Xodo PDF Reader and Editor Presentation title 6  Made with Xodo PDF Reader and Editor Pectoralis Major Origin Insertion it arises by two heads: by a bilaminar tendon onto the lateral lip of the bicipital  Clavicular head: from the medial half of the anterior aspect groove of the clavicle.  Sternocostal head from the  lateral half of the anterior surface of the sternum.  upper 6 costal cartilages.  Made with Xodo PDF Reader and Editor ‫القاعدة االولي‬ Insertion toward Origin Made with Xodo PDF Reader and Editor  Made with Xodo PDF Reader and Editor What is the nerve supply and action of Pectoralis major? 10  Made with Xodo PDF Reader and Editor Nerve supply: lateral and medial pectoral nerves PECTORALIS MAJOR Action: 11 Flexion (clavicular head ) adduction medially rotation of the arm.  Made with Xodo PDF Reader and Editor 2-Together with latissmus dorsi, it draws the trunk towards the upper limb as in climbing and swimming. ‫ عكس القاعدة بحرك‬origin toward insertion Presentation title 12  Made with Xodo PDF Reader and Editor What is the origin and insertion of Pectoralis minor? 13  Made with Xodo PDF Reader and Editor PECTORALIS MINOR 14 Origin: Insertion It arises from the 3rd, 4th, and 5th ribs, It is inserted into the medial border and near their costal cartilages. upper surface of the coracoid process of the scapula.  Made with Xodo PDF Reader and Editor PECTORALIS MINOR Nerve Supply: medial pectoral nerve Action: Protraction and depression of the scapula Presentation title 15  Made with Xodo PDF Reader and Editor SUBCLAVIUS MUSCLE 16  Origin: from the first rib at its costochondral junction.  Insertion: into the subclavius groove on the lower surface of the clavicle.  Made with Xodo PDF Reader and Editor SUBCLAVIUS MUSCLE  Nerve supply: nerve to subclavius Action: stabilizes the medial end of the clavicle during movement of the shoulder joint(act as ligament Presentation title 17  Made with Xodo PDF Reader and Editor 18 What are the Structures piercing the clavipectoral fascia?  Made with Xodo PDF Reader and Editor clavipectoral fascia 19  Made with Xodo PDF Reader and Editor STRUCTURES PIERCING THE 20 CLAVIPECTORAL FASCIA 1. Thoraco-acromial artery. 2. Cephalic vein. 3. Lateral pectoral nerve. 4. Lymph vessels.  Made with Xodo PDF Reader and Editor Presentation title 21  Made with Xodo PDF Reader and Editor 22 What is the Serratus anterior (BOXER MUSCLE)?  Made with Xodo PDF Reader and Editor Presentation title 23  Made with Xodo PDF Reader and Editor Presentation title 24  Made with Xodo PDF Reader and Editor SERRATUS 25 ANTERIOR Origin: Insertion: by 8 fleshy digitations from the upper 8 ribs. into the ventral surface of the medial border of the scapula and the ventral surface of the inferior angle.  Made with Xodo PDF Reader and Editor Serratus anterior origin insertion 1 2 1 3 4 5 6 2,3 7 8 4-8  Made with Xodo PDF Reader and Editor Presentation title 27 Nerve supply by the long thoracic nerve (nerve of Bell C5, 6, 7).  Made with Xodo PDF Reader and Editor SERRATUS ANTERIOR 28  Action: 1. The main Protractor of the scapula (pushing, punching). 2. The lower five digitations together with the upper and the lower fibers of trapezius rotate the scapula laterally, so the glenoid fossa becomes directed upwards. This action abducts the arm from 90 to 180 degrees. 3. It fixes the scapula to the posterior thoracic wall. 4. Assists in deep inspiration.  Made with Xodo PDF Reader and Editor Presentation title 29 Made with Xodo PDF Reader and Editor 30 Paralysis of the long thoracic nerve leads to ….  Made with Xodo PDF Reader and Editor PARALYSIS OF THE LONG THORACIC NERVE (WINGED SCAPULA) : 31 Lesion Lesion Deformity Blows or pressure in The patient can't elevate his This deformity is called winged scapula. posterior triangle of neck In arm above the level of the radical mastectomy (surgical head (from 90 to 180 removal of the breast) degrees). Made with Xodo PDF Reader and Editor