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,6th 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

Websiteshttp://www6.district125.k12.il.us/science/anatomy/http://www.innerbody.com/htm/body.html http://www.e-radiography.net/

http://www.getbodysmart.com/index.htm

References

Outlines ( Bony Thorax)

■ Sternum: anterior

■ Thoracic vertebrae: posterior

■ Ribs (12 pairs) : connecting

Bony Thorax ( Sternum)

Flat bone with three divisions

• Manubrium:Manubrium:• Upper portion• 2 inches• Indentations (jugular, clavicular, costal)

• Body:Body:• Middle portion• 5 inches• Costal notches

• Xiphoid process:Xiphoid process:• Lower portion• Small• Vary in size and shape

Bony Thorax ( RIBS)1. Vertebral end1. Vertebral end:: posteriorposterior• Head: articulate with body of Thoracic vertebra• Neck: • Tubercle: articulate with Trans.Process.

2. Shaft:2. Shaft: lateral lateral forward forward downward downward• Costal Angle: • Costal groove: artery, vein, nerve

3. Sternal end: 3. Sternal end: anterioranterior• 3 to 5 inches lower than vertebral end

12

3

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

HeadBody

AngleVertebral end

Costal Cartilage

Costal Cartilage

RibsSternum

Bony Thorax ( RIBS)

Sternum Sternal end

Vertebra

HeadBody

AngleVertebral end

Costal Cartilage

Sternum

Ribs

Vertebra

Bony Thorax ( RIBS)

122

3

1. Ribs2. Clavicle3. 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

Shoulder Joint

1. Clavicle2. Acromioclavicular joint3. Acromion4. Greater tubercle of humerus5. Head of humerus6. Lesser tubercle of humerus7. Surgical neck of humerus8. Coracoid process9. Glenoid fossa10. Shoulder joint11. Lateral border of scapula

AP Shoulder

Shoulder Joint

THANK YOU