New Model of Human Red Nucleus Figure 1. WGA-HRP injection sites in cat’s inferior olivary complex (case 1 and 2). The upper two columns comprise a scale drawing of the distribution of injected WGA-HRP solution in the cat’s inferior olivary complex in case 1 and 2. The Roman numerals (II-XIV) represent levels of the inferior olivary complex from caudal to rostral (Brodal, 1940 [60]). The crossed stripes indicate a heavily stained area. Lower photomicrographs show the maximal extent of injected wheat germ agglutinin-horseradish peroxidase (WGA-HRP) at the olivary level (Fig. 1) in case 1 (A) and case 2 (B). DAO– dorsal accessory olive, MAO–medial accessory olive, PO–principal olive, vlpNr–ventorlateral part of parvicellular red nucleus, b–nucleus b. Scale bar = 500 mm in B (also applies to A). doi:10.1371/journal.pone.0006623.g001 PLoS ONE | www.plosone.org 3 August 2009 | Volume 4 | Issue 8 | e6623