Definition for View source for Processus reticularis

The processus reticularis is prominent on the outer side of the gray matter between the 
anterior and posterior horns. The anterior horns are short and broad and appear of large size, which is due somewhat to the lateral extension of gray matter forming the lateral horns. The posterior horns are long and slender and gently diverge, the divergence increasing as the segments gradually approach the medulla. At the same time the central canal trends backward and assumes a somewhat flattened appearance. The nerve-roots leave the cord at nearly right angles.