2. Whole Brain ThinkingHerrmann 4-Quadrant Brain Model People are different. Different modes of learning, knowing & perceiving. Ned Herrmann develops 4-quadrant brain model. To diagnose thinking styles based on brain specialization. Model is based on brain physiology yet it is a metaphorical model.PhysiologyArchitectureMetaphorApplication. Whole brain thinking. Our brain is our most precious resource explore it, improve it, use it!