The foundation of neuron activity, is based on the pumping and exchange of sodium and potassium cations at their membrane. The sodium cations are pumped out, while potassium cations accumulate within. This is energy intensive and results in the building of energy within the membrane.
All the rest of the cells of the body use this same pumping/exchange schema, with neurons generating higher level of membrane energy than all other cell types. This membrane process builds the energy on which neuron firing, memory and thoughts are based. Since all other cells make use of this same cation pumping and exchange schema, to also build up membrane potential, there is parallel in terms of energy and cations.
If you took tissue samples, randomly throughout the body, the various cell types will be surrounded by circulatory, lymphatic and nerve related tissues. The nerve related tissue is one way the brain talks to the cells using their common cationic connection. Someday we will be able to use the brain to talk to cells in ways that can return cells to differentiation control.
Correlations have shown a connection between positive thought and health. The membrane potential and firing associated with positive thought appears to communicate to the body with the membranes the common link.