Tridoshas

The Tridoshas (tri meaning three and doshas being the basic physical energies) are the primary and essential factors of the human body that govern our entire physical structure and function. Derived from the Panchmahabhutas, each dosha – which like the elements cannot be detected with our senses but their qualities can be – is a combination of any two of the five bhutas with the predominance of one. Called Vata, Pitta and Kapha in Sanskrit, these three are responsible for all the physiological and psychological processes within the body and mind – dynamic forces that determine growth and decay. Every physical characteristic, mental capacity and the emotional tendency of a human being can therefore be explained in terms of the tridoshas.

Trigunas

Just as the doshas are the essential components of the body, the three gunas - Satwa, Rajas and Tamas - are the three essential components or energies of the mind. Ayurveda provides a distinct description of people on the basis of their Manasa (psychological) Prakriti (constitution). Genetically determined, these psychological characteristics are dependent on the relative dominance of the three gunas.
While all individuals have mixed amounts of the three, the predominant guna determines an individual's mansa prakriti. In equilibrium, the three gunas preserve the mind (and indirectly the body), maintaining it in a healthy state. Any disturbance in this equilibrium results in various types of mental disorders.