The spinal cord is a primary component of the central nervous system, extending downward from the brain within the vertebral column. Its fundamental role is to serve as the main pathway for electrical signals, transmitting information both from the body to the brain and from the brain to the body. Structurally, it contains both gray matter, which consists of neuronal cell bodies, and white matter, which comprises myelinated axons. This organization allows it to facilitate reflex actions and regulate signals necessary for motor control, sensory input, and autonomic functions below the neck. Damage to the cord can severely interrupt communication between the brain and the peripheral nerves, impacting physical function and sensation.