Radiographic Anatomy Skeletal System Bony Thorax & shoulder Girdle

Educational Objectives By the end of this lecture you should be able to:  Identify the anatomical parts of bony thorax on diagrams and radiographs.  Identify the different joints of bony thorax and classify their type of movement.  State the surface land marks of bony thorax and explain its importance in radiographic positioning  Explain how to hang radiographs of bony thorax on the view box

4 1. Text book of radiographic positioning and related anatomy; by Kenneth L.Bontrager,6 th edition. 2. Introduction to Human Anatomy and Physiology: by Eldra Pearl Solomon:W.B.Saunders Company 3. Handbook of Anatomy and physiology for Students of Medical Radiation Technology: Mallett.M:Jaspar Websites References

Outlines ( Bony Thorax) ■ Sternum: anterior ■ Thoracic vertebrae: posterior ■ Ribs (12 pairs) : connecting

Bony Thorax ( Sternum) Flat bone with three divisions Manubrium:Manubrium: U pper portion 2 inches Indentations (jugular, clavicular, costal) Body: Middle portion 5 inches Costal notches Xiphoid process: Lower portion Small Vary in size and shape

Bony Thorax ( RIBS) 1. Vertebral end: posterior Head: articulate with body of Thoracic vertebra Neck: Tubercle: articulate with Trans.Process. 2. Shaft: lateral  forward  downward Costal Angle: Costal groove: artery, vein, nerve 3. Sternal end: anterior 3 to 5 inches lower than vertebral end  The rib cage is part of the axial skeleton and assist in breathing as well as protect internal organs.

Bony Thorax ( RIBS)  The rib cage is part of the axial skeleton Assist in  Breathing  Protect internal organs.

Bony Thorax ( RIBS) Elongated, flattened, and twisted bones Sternum Sternal end Vertebra Head Body Angle Vertebral end Costal Cartilage Ribs Sternum

Bony Thorax ( RIBS) Sternum Sternal end Vertebra Head Body Angle Vertebral end Costal Cartilage Sternum Ribs Vertebra

Bony Thorax ( RIBS) Ribs 2.Clavicle 3.Sternum superimposed over heart and Vertebrae

 The pectoral girdle- consist of the scapula and clavicle, attaches upper limbs to axial skeleton, and provides attachment sites for muscles  A. Clavicles-also called the collarbone, they are long bones.  B. Scapulae-also called shoulder-blades, they are flat bones with three borders. Shoulder Girdle( Clavicles & Scapulae) Clavicle Scapula

Shoulder Girdle  Shoulder or Pectoral Girdle  Clavicle- attaches to sternum and scapula  Scapula  Acromion Processes  Coracoid processes  Glenoid cavity- holds humeral head

Shoulder Joint  The glenohumeral joint  Articulation between the humeral head and the Glenoid fossa of the scapula  The glenohumeral joint is a ball- and-socket joint that allows for the arm to move in a circular rotation as well as movement of the arm towards and away from the body.  The acromio clavicular joint Articulation between the lateral end of the clavicle and the Acromion process of the scapula A.C Joint glenohumeral joint

Shoulder Joint

1. Clavicle 2. Acromioclavicular joint 3. Acromion 4. Greater tubercle of humerus 5. Head of humerus 6. Lesser tubercle of humerus 7. Surgical neck of humerus 8. Coracoid process 9. Glenoid fossa 10. Shoulder joint 11. Lateral border of scapula AP Shoulder Shoulder Joint

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