Iris dilator muscle "musculus dilator pupillae", The "Nomina Anatomica" as authorized in 1895 in Basle and in 1935 in Jena used the full Latin expression. Iris dilator muscle The iris dilator muscle (pupil dilator muscle, pupillary dilator, radial muscle of iris, radiating fibers), is a smooth muscle of the eye, running radially in the iris and therefore fit as a dilator. The pupillary dilator consists of a spokelike arrangement of modified contractile cells called myoepithelial cells. These cells are stimulated by the sympathetic nervous system. When stimulated, the cells contract, widening the pupil and allowing for more light to pass through the eye.
World Colored Light Heavyweight Championship World Colored Light Heavyweight Championship The World Colored Light Heavyweight Championship was a title created in 1921, when African American boxers were prevented from contending for the world light heavyweight title by the color bar. On 30 May 1921, Kid Norfolk fought Lee Anderson for the new colored light heavyweight title in a scheduled 10-round bout in Phoenix, Arizona. Anderson won on a T.K.O. when Norfolk returned to his corner in the ninth round, being unable to continue to fight. (They would meet another three times in non-title bouts between 1922 and 1924, and The Kid prevailed each time.) Anderson