Although i am not an expert, but i like to mention some facts.
Chathasikas collectively determine as Chitta(Naama).
"Banga " is current situation of "Chitta -(Naama-roopa)".
The persion who can feel(see/live) now have experiance "Banga Gana" and-"UdayaWaya". rising and decaying of "NaamaRoopa".
If "life" is a flow then the Attributes of current moment as follows;
perception - "sangna". feeling - "Veedana". Action - "Sankara". are some chethasikas belongs to Naama. There are also "roopa" and consiouness - "Vingnana" - in background.
There can be other Sankaras or chathsikas according the situation. (Depend on the roopa and Kamma-Vingnana). feeling and perception are also chathsikas belong to 52 chathasika (Model).
The strategy to understand above is:
Follow "Mahasathipattana Suttha"- (Ekayano Maggo).
For the help of clear understanding we take smiler example.
As a example, lets suppose that the meditator had a "kaya(physical BODY)". How to determine what are the elements were at each of 32 parts, out of 4 "Mahabootha"? We know there must be patavi apoo thego and vayo boothas in roopa at previously mentioned kaya, but how to determine the amount or the power of these boothas?
Here BODY(kaya) is one. (physio-physical level)
32 parts are small bodies. (Bio-chemical level)
4 MahaBoothas are Lover level energy. (physical)
As Like this
Mana is collective chttha.
Chitta is collective chathasika.
How does the process work? The mind – consciousness – gives rise to our experience of reality. We experience the physical and mental reality around us according to our state of mind. So this conscious mind is said to give rise to the mental-physical reality we experience from one moment to the next. For instance, when we practice meditation, we experience the stomach, rising and falling. When we breathe, when the stomach rises, when the stomach falls, there is the physical and the mental aspects of the experience. The rising is physical and the knowing of the rising is mental. When we walk, there’s the foot moving, which is physical, and the mind knowing it, which is mental. When we feel pain, there’s the physical experience and there’s the mind that knows it and doesn’t like it and decides that it is unpleasant. And so on.