  Macroscopic EEG fields can be an explicit top-down neocortical mechanism that
directly drives bottom-up processes that describe memory, attention, and other
neuronal processes. The top-down mechanism considered are macrocolumnar EEG
firings in neocortex, as described by a statistical mechanics of neocortical
interactions (SMNI), developed as a magnetic vector potential $\mathbf{A}$. The
bottom-up process considered are $\mathrm{Ca}^{2+}$ waves prominent in synaptic
and extracellular processes that are considered to greatly influence neuronal
firings. Here, the complimentary effects are considered, i.e., the influence of
$\mathbf{A}$ on $\mathrm{Ca}^{2+}$ momentum, $\mathbf{p}$. The canonical
momentum of a charged particle in an electromagnetic field, $\mathbf{\Pi} =
\mathbf{p} + q \mathbf{A}$ (SI units), is calculated, where the charge of
$\mathrm{Ca}^{2+}$ is $q = - 2 e$, $e$ is the magnitude of the charge of an
electron. Calculations demonstrate that macroscopic EEG $\mathbf{A}$ can be
quite influential on the momentum $\mathbf{p}$ of $\mathrm{Ca}^{2+}$ ions, in
both classical and quantum mechanics. Molecular scales of $\mathrm{Ca}^{2+}$
wave dynamics are coupled with $\mathbf{A}$ fields developed at macroscopic
regional scales measured by coherent neuronal firing activity measured by scalp
EEG. The project has three main aspects: fitting $\mathbf{A}$ models to EEG
data as reported here, building tripartite models to develop $\mathbf{A}$
models, and studying long coherence times of $\mathrm{Ca}^{2+}$ waves in the
presence of $\mathbf{A}$ due to coherent neuronal firings measured by scalp
EEG. The SMNI model supports a mechanism wherein the $\mathbf{p} + q
\mathbf{A}$ interaction at tripartite synapses, via a dynamic centering
mechanism (DCM) to control background synaptic activity, acts to maintain
short-term memory (STM) during states of selective attention.
