Sensory inputs within normal range continuously enter into brain with a physical shear stress effect on the layers of brain. These stresses are within the safe range of absorption by the brain as an elastic material. The duration of input effect for normal ranges of stress is in term of milliseconds and maximum as long as a brain activity and related working memory continues. Any brain activity is a process of: receiving the pattern of input through consequence stress flow; searching a balance state for new conditions and releasing excess of stresses as response. The total process includes stress transfer, absorption, desorption and dispatch of transferring free energy associated to the result strains due to stresses. This book attempts to explain this process in a kinematic way of description.