white matter

**white matter**

White matter refers to the regions of the brain and spinal cord that are primarily composed of myelinated nerve fibers (axons). It plays a crucial role in transmitting signals between different areas of the nervous system, facilitating communication within the brain and between the brain and the rest of the body. White matter is essential for cognitive functions, motor skills, and overall neural connectivity. In medical and neuroscience contexts, studying white matter can help in understanding various neurological conditions and brain health.