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 defended the title on the Fourth of July 1921 in a 10-round bout in Phoenix, Arizona, beating Rough House Ware on points. When Norfolk fought The Jamaica Kid on 20 December 1921 at Madison Square Garden in New York City, he had claimed the world colored light heavyweight title. He beat the Jamaica Kid on points in an eight-round bout. In Atlanta on 30 January 1922, Norfolk faced Tiger Flowers, the boxer who would become the first African American world middleweight champ in 1926, K.O.-ing him in third round of a 10-rounder. He apparently had vacated the title when he