GENERAL HISTOLOGY

Detailed explanation-1: -The grey matter, in the center of the cord, is shaped like a butterfly and consists of cell bodies of interneurons and motor neurons, as well as neuroglia cells and unmyelinated axons.

Detailed explanation-2: -White matter in the spinal cord is sometimes called superficial tissue because it is located in the outer regions of the brain and spinal cord. Gray matter is situated closer to the center of the central nervous system.

Detailed explanation-3: -In lower segments of the spinal cord, there is less white matter because there are fewer axons traveling to and from the brain. There are also differences in the gray matter. In the cervical segment, the ventral horn (the lower half of the segment) is enlarged.

Detailed explanation-4: -At the lower levels of the spinal cord there is a greater ratio of grey matter to white matter. This should make sense, as there are less ascending and descending tracts of whiter matter as you move lower.