Those words with characters that match the visual representation of the word one is observing, receive excitatory signals.

In addition, these nuclei receive both inhibitory and excitatory signals from other parts of the brain which in turn affect the nucleus's outgoing signals.

It is this 'switching off' that activates the next cell and sends an excitatory signal down the neural pathway.

This results in an increased effective threshold of required excitatory signals in order to induce an action potential in a postsynaptic neuron.

This combination of excitatory signals from different receptors makes up what we perceive as the molecule's smell.

Transmission of an excitatory signal involves several steps outlined below.

The excitatory signals induce contraction of the muscle cells, which causes the joint angles in the arm to change, pulling the arm away.

Because sufficient excitatory signals are received at their dendrites.

If the summation of all excitatory and inhibitory signals depolarize the cell membrane to the threshold voltage, an action potential is fired.

The lateral vestibulospinal tract provides excitatory signals to interneurons, which relay the signal to the motor neurons in antigravity muscles.