Does Abhidhamma explain how Attention Shift happens

Every cita has an Object associated with it. when we meditate on breath then the object of attention is breath.. and after some time suddenly a past memory image pops up.. can one explain in terms of abhidhamma mind-moment model.. How the object of attention changed. and compare it with new, medium and adapt practitioners perspective. -------------------------------------- **EDIT** There are 3 answers and yet there is no answer. I myself did some more research and concluded as following. I think abhidhamma, or buddhism as such has no explanation for attention Shift from one object to another. As each mind moment has object which can be different from previous and each mind moment has cetasika called manaskāra. I never understand what kind of cetasika it is. 1. Is it yes / No to current object. 2. Is it intensity of attention like 0% to 100 %. 3. Is it pointer to object of attention. It could be current object or another object altogether. However **Patanjali yoga sutra has more clear answer** to this. they attribute it to unconscious activity. and called that 'manasa'. 'Manasa' is organ of body which travels to any location of body. and then only objects of that part are thrown to consciousness. It filters the data of all sense door... This is quite close to modern neuroscience too as hypothalamus in brain. This manasa can be instructed to change its filters . I am giving a link to a **PDf document which compares buddhism and patanjali yogasutra only around this question** .. Its too good. [Contrasting_Nyaya_Vaiseika_and_Buddhist.pdf ][1]