““When someone is told to speak, the area of the left temporal cortex is flushed with blood. Knowing that astrocytes, not neurons, have their end feet on the blood vessels, it is possible that astrocytes signal to neurons to fire to move the tongue in specific manner for speaking while also controlling blood flow to oxygenate themselves and neurons in the area. As sodium goes in the cell, neurons need oxygen in their mitochondria in order to produce the energy they need to pump out the sodium.””