The speed of a nerve signal is fastest in the nucleus. This is because it is the centermost part of the cell responsible for all voluntary and involuntary functions.
What do you mean by Nerve signal?
A nerve signal may be defined as a charge of electricity that runs along with a nerve fiber. The signal travels along a cell's axon toward a neighboring neuron.
Medullated nerve fibers conduct the fast impulse of nerve signals. This is because myelinated nerve fibers are made up of lipids that do not leak the current of electrical impulse. Hence, they conduct the fastest nerve signal.
Therefore, it is well described above.
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