  We present a detailed field theoretic description of those collective degrees
of freedom (CDF) which are relevant to study macroscopic quantum dynamics of a
quasi-one-dimensional ferromagnetic domain wall. We apply spin coherent state
path integral (SCSPI) in the proper discrete time formalism (a) to extract the
relevant CDF's, namely, the center position and the chirality of the domain
wall, which originate from the translation and the rotation invariances of the
system in question, and (b) to derive effective action for the CDF's by
elimination of environmental zero-modes with the help of the {\it Faddeev-Popov
technique}. The resulting effective action turns out to be such that both the
center position and the chirality can be formally described by boson coherent
state path integral. However, this is only formal; there is a subtle departure
from the latter.
