Radiation

(ra-de-a' -shun). 1 gence from a center; having the appearance of rays. of fibers strand radiata, a large Gratiolet, R., Optic, tinuous of with those of the corona d con mainly from the pulvinar, the external and internal gen iculate bodies, and the optic tract, and radiating into the occipital lobes. R., Thalamic, certain tracts I fibers from the optic thalami, which radiate into the hemispheres (Spitzka). R. -theory of Rauber, a theory to explain the origin of double monsters. " It -ed upon the fact that in the earliest stage the embryonic trace extends from the edge of the germinal wall or ridge toward the area pellucid a as a radius. When a plural formation occurs, Rauber a umes that two, or even three, of these embryonic traces appear instead of one, the development being designated as pluriradial." "