Anatomy Lec2 PDF - SAWA University, First Year

‫جامعة ساوه‬ ‫كلية التقنيات الصحيه والطبيه‬ ‫قسم االشعه والسونار‬ ‫المرحله االولى‬ ‫تشريح الهيكل العظمي\المحاضره الثانيه‬ ‫م‪.‬م‪.‬مروه غانم السعيدي‬  Pectoral Girdle. Arm :...

‫جامعة ساوه‬ ‫كلية التقنيات الصحيه والطبيه‬ ‫قسم االشعه والسونار‬ ‫المرحله االولى‬ ‫تشريح الهيكل العظمي\المحاضره الثانيه‬ ‫م‪.‬م‪.‬مروه غانم السعيدي‬  Pectoral Girdle. Arm : Humerus. The Bones of Upper limb )UL( Forearm : Radius & Ulna. are: Wrist : Carpal bones Hand: Metacarpals& Phalanges  Skeleton of the Upper limb : Its consist from : 1-Skeleton of the shoulder: * clavicle bone: is along slender bone lies horizontal across the neck * scapula :The scapula is a flat triangular bone that lies on the posterior. There are three angle to the scapula (superior ,inferior ,lateral angle). clavicle bone It is a long bone has the appearance of an elongated letter Capital (S) lying on one side. It has Two Ends: Medial (Sternal) Lateral (Acromial) Body (shaft) Surfaces: Superior Inferior Articulations of Clavicle — edially with the manubrium M at the Sternoclavicular joint. L—aterally with the Scapula at the Acromioclavicular joint I—nferiorly with the 1st rib at the Costoclavicular Joint  Scapula (Shoulder Blade) Three Processes: It is a triangular Flat — Spine. bone.: Acromion. Coracoid. It resembles in size, shape and direction a Three Borders: Superior, Medial & Lateral (the bent finger pointing thickest) part of the bone to the shoulder.  Superior. Lateral(forms the Glenoidcavity) : a shallow concave Three Angles : oval fossa that receives the head of the humerus. Inferior. Two Surfaces: 1.Convex Posterior 2.Concave Anterior (Costal(. 2-Skeleton of the upper arm ( Hummers bone ): Humerus A typical Long bone. It is the largest bone in the UL — Proximal End : — -Head, Neck, Greater & Lesser Tubercles. -Head : Smooth it forms 1/3 of a sphere, it articulates with the glenoidcavity of the scapula. Shaft (Body): has two prominent features: 1. Deltoid tuberosity:. 2. Spiral (Radial) groove: Structures at distal end: Anteriorly: -Trochlea:(medial) for articulation with the ulna -Capitulum:(lateral) for articulation with the radius. -Coronoid fossa :above the trochlea. -Radial fossa: above the capitulum. Posteriorly: Olecranon fossa :above the trochlea. Ulna: It is the stabilizing bone of the forearm.It is the medial & longer of the two bones of the forearm. -Proximal End 1. Olecranon Process : projects proximally from the posterior aspect 2. Coronoid Process : projects anteriorly. 3.Tuberosity of Ulna: inferior to coronoid process. 4.Trochlear Notch: articulates with trochlea of humerus. 5.Radial Notch : a smooth rounded concavity lateral to coronoid process. Shaft: -Thick and cylindrical superiorly but diminishes in diameter inferiorly -It has Three Surfaces (Anterior, Medial & Posterior). Sharp Lateral Interosseous border. — Distal End: Small rounded — 1. Head : lies distally at the wrist.. 2. Styloid process :Medial. Radius: It is the shorter and lateral of the two forearm bones. -Proximal End: 1. Head: small & circular Its upper surface is concave for articulation with the Capitulum. 2. Neck. 3. Radial (Biciptal) Tuberosity: medially directed and separates the proximal end from the body. 3-Shaft: -Has a lateral convexity. -It gradually enlarges as it passes distally Distal (Lower) end :It is rectangular 1. Ulnar Notch :a medial concavity to accommodate the head of the ulna. 2.Radial Styloid process: extends from the lateral aspect. 3.Dorsal tubercle: projects dorsally.