Nerves resemble enclosed, cable-like bundles of nerve fibers, also known as axons, within the peripheral nervous system. Think of them like tiny, intricate electrical cables throughout your body.
Microscopic View:
At a microscopic level, nerves are composed of many individual nerve fibers (axons) bundled together. These axons transmit electrical signals throughout the body. The bundles are often surrounded by connective tissue sheaths that provide support and protection. The appearance at this level is complex and requires specialized microscopy. The Electromyography (EMG) and Nerve Conduction Studies can visualize nerve activity, which on an EMG looks like "wavy and spiky lines".
Macroscopic View:
Larger nerves, visible to the naked eye during surgery or dissection, appear as whitish, cord-like structures. Their size and appearance can vary depending on location and function. They can range from very thin threads to thicker cords. For example, surgical repair of a nerve often requires careful handling of these structures which are described as similar to "electrical cords".
Nerves within the Nervous System:
The peripheral nervous system, which includes nerves extending from the brain and spinal cord to the rest of the body, can be visualized as branching "tree branches", with the brain and spinal cord forming the trunk. (Nervous System: What It Is, Parts, Function & Disorders) These nerves connect various parts of the body, enabling communication and control. Nerves are also an important component of the central nervous system, including the brain, optic nerves, and spinal cord. Multiple Sclerosis (MS) affects the nervous system and can have a variety of symptoms.
Nerves and Disease:
Damage to nerves can manifest in various ways depending on location and extent of the damage. Some cancers, such as sarcomas, can develop in soft tissues, including nerves. (What Does A Sarcoma Lump Look and Feel Like?) Nervous system disorders can present with a wide array of symptoms. (Overview of Nervous System Disorders)
