A nerve is an enclosed bundle of axons in the peripheral nervous system, transmitting electrochemical signals between the body and the central nervous system. Authors have long examined nerves as both physiological structures and metaphors for sensitivity.
Lytton compared them to "sentinels" conveying bodily signals to the brain, while Call viewed them as channels for mental strain, recommending rest and rhythm to manage "nerves." Others, like Granger, connected sensory nerves to pain and survival instincts, highlighting their role in detecting external stimuli. These viewpoints emphasize nerves as essential pathways for both biological processes and human experience.