In the anandamaya kosha, one is in the healthiest and most harmonious state possible.
In the vigyanmaya kosha there are movements, and they are channeled in the right direction.
The yogic texts state that imbalances begin in the manomaya kosha. Desire is aroused in this kosha, and likes and dislikes come to surface. Desire begins to govern our actions, and we become misguided. Illness originates here. Agitation starts, the desire intensifies, filtering through to the ranamaya kosha, manifesting as disease in the annamaya kosha. The annamaya kosha is disrupted when the pranamaya kosha is disturbed by the manomaya kosha.