First, the neural synergetics are discussed. Then based on the basic equations of synergetics, we derive quantitatively the Lorenz equations and Lorenz mode of brain, whose two wings correspond to two hemispheres of brain, and two hemispheres jump about, which describes thinking. It shows that life lies in cooperation in chaos. The neural synergetics possesses three levels: structure, activity and thinking on brain. Next, based on the quantum and nonlinear neurobiology, we discuss the soliton-chaos double solutions of the nonlinear equation, and their possible meaning. Finally, combining some known theories in neurobiology and the elastic hypothesis of memory, etc., the physical neurobiology is proposed

neurobiology, synergetics, brain, Lorenz model, nonlinear theory, memory