After some looking, look at //
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2518057/ Striatal neurons fire in relation to movement of a particular body part but also to preparation of movement, desired outcome of a movement, to visual and auditory stimuli and to visual saccades toward a particular direction.
(Seems new movements is literally, just that, and why very young children....Get by....??and.....learn? new movements. And has nothing to do with New Movements, which is.....? Political movements, religious movements.....?
(assuming missing words, and rearrangement)
First guess, It is in the nature of children to GET Involved, in new ideas, movements.
One stage of child development, adolescent, is self centered narcissistic idea of omniscience, whether this is good or bad.........