The brain in conjunction with the body is able to adapt to new
environments and perform multiple behaviors through reuse of
neural resources and transfer of existing behavioral traits. Al-
though mechanisms that underlie this ability are not well un-
derstood, they are largely attributed to neuromodulation. In
this work, we demonstrate that an agent can be multifunctional
using the same sensory and motor systems across behaviors,
in the absence of modulatory mechanisms. Further, we lay out
the different levels at which neural reuse can occur through
a dynamical filtering of the brain-body-environment system’s
operation: structural network, autonomous dynamics, and tran-
sient dynamics. Notably, transient dynamics reuse could only
be explained by studying the brain-body-environment system
as a whole and not just the brain. The multifunctional agent we
present here demonstrates neural reuse at all three levels.