GENERAL HISTOLOGY

Detailed explanation-1: -[4] The grey matter contains the majority of neuron somas, making it appear tan with circulation but grey when prepared for examination outside of the body. These somas are circular structures that house the nucleus of the cells. The grey matter also extends from the brain into the spinal cord.

Detailed explanation-2: -The grey matter is mainly composed of neuronal cell bodies and unmyelinated axons. Axons are the processes that extend from neuronal cell bodies, carrying signals between those bodies.

Detailed explanation-3: -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. Projections of the grey matter (the “wings”) are called horns.

Detailed explanation-4: -White matter does not contain any cell bodies, but mostly contains myelinated nerve fibres. The central region of the spinal cord is grey matter, and the surrounding region is white matter.