====== RADIUS ======

  * RADIUS
    * Head
      * Articular facet
      * Articular circumference
    * Neck
    * Shaft; body
      * Radial tuberosity
      * Anterior surface
      * Posterior surface
      * Lateral surface
      * Pronator tuberosity
      * Interosseus border
      * Anterior border
      * Posterior border
    * Radial styloid process
      * Suprastyloid crest
    * Dorsal tubercle
    * Grooves for extensor muscle tendons
    * Ulnar notch
    * Carpal articular surface


|  713  |   |  RADIUS                                |  RADIUS                               |   |
|  714  |   |  Caput radii                           |  Head                                 |   |
|  715  |   |  Fovea articularis                     |  Articular facet                      |   |
|  716  |   |  Circumferentia articularis            |  Articular circumference              |   |
|  717  |   |  Collum radii                          |  Neck                                 |   |
|  718  |   |  Corpus radii                          |  Shaft; body                          |   |
|  719  |   |  Tuberositas radii                     |  Radial tuberosity                    |   |
|  720  |   |  Facies anterior                       |  Anterior surface                     |   |
|  721  |   |  Facies posterior                      |  Posterior surface                    |   |
|  722  |   |  Facies lateralis                      |  Lateral surface                      |   |
|  723  |   |  Tuberositas pronatoria                |  Pronator tuberosity                  |   |
|  724  |   |  Margo interosseus                     |  Interosseus border                   |   |
|  725  |   |  Margo anterior                        |  Anterior border                      |   |
|  726  |   |  Margo posterior                       |  Posterior border                     |   |
|  727  |   |  Processus styloideus radii            |  Radial styloid process               |   |
|  728  |   |  Crista suprastyloidea                 |  Suprastyloid crest                   |   |
|  729  |   |  Tuberculum dorsale                    |  Dorsal tubercle                      |   |
|  730  |   |  Sulci tendinum musculorum extensorum  |  Grooves for extensor muscle tendons  |   |
|  731  |   |  Incisura ulnaris                      |  Ulnar notch                          |   |
|  732  |   |  Facies articularis carpalis           |  Carpal articular surface             |   |

===== analogy =====

Upper end 


Middle 


Lower end 


This pillar is not straight and has a tubercle on medial side and at the base on posterior side.this pillar acts like a connecting string. 


Interosseous border ( interstatue border ) is a very sharp and it is also called as medial border. It extends from the radial tuberosity above to the posterior margin  of ulnar notch (screw notch )  below on the pillar where the head of the screw statue articulates. 

Front border extends from the anterior margin of pillar tuberosity to the 

Anterior surface of the pillar lies between the interstatue border and the front border of pillar.


Posterior surface between interstatue border and back border 

Lateral surface is present between front border and back border . It is rough in medial 1/3 rd part .. 

Lower end 

Lower end is expanded and has 5 surfaces . The base of the pillar has 5 surfaces namely anterior , medial , lateral , posterior and inferior surface . 

Front surface of pillar is continued from the stem of pillars front surface. 

Back surface of the base of pillar has grooves and a named engraving called tubercle of Lister . 
This engraving lies lateral to oblique groove. This groove has tendon of ( long thumb rubber band ) extensor pollicis longus . 

Medial surface of the base of pillar  has screw notch which articulates with the head of screw statue. 

Lateral surface is prolonged and forms the styloid process 

The base of the radius has an inferior surface which lies on the top of two infinity stones. Laterally it has a triangular articular surface which lies of the scaphoid (infinity stone of reality ) and  Medially there is a quadrangular articular surface which lies on top of the lunate (moon shaped infinity stone of reality )