And because glucose fuels the neurons, a transitory low level in the brain may signal the stomach to get the hands to fill up the mouth, even though the energy actually spent has gone up just a hair.

Such ideas are being explored with brain scans which suggest that even if a low level of pain is being sent to the brain, the signal can be turned up by the “mind” itself.

For certain signal types, such as low level or high frequency, the analog backplane should not be used to avoid possible signal degradation.