Neurons, also known as nerve cells, are the basic units that make up the structure and function of the nervous system. Neurons are cells with long synapses (axons), which are composed of cell bodies and cell protrusions. Cell protrusions, or cytosol, can be divided into dendrites and axons. Dendrites are a kind of cell body from the dendrites like dendrites, often a branch into two branches, branches and branches, dendrites within the protofibers and Nystrom's body; axon is a kind of cell body from the elongated protuberance, a neuron has only one axon, and the cell body connected to the conical place called the axon mound, the axon mound without Nystrom's body. Axons vary in length, with small neurons having short, thin axons and large neurons tending to have longer axons; intact axons are surrounded by a myelin sheath. Dendrites, axons and their wrapped attachments become nerve fibers, distributed in other tissues or organs on the end of the nerve fibers of tiny branches called nerve endings. There are more methods of staining neurons and nerve fibers, mainly using silver plating stain, tar violet stain, Luxol fast blue, etc.

Nerve axon staining solution (glycine silver immersion plating method) is a typical silver plating staining method, the basic principle of which is that the fixed tissues and sections are immersed in silver solution, due to the axons of nerve fibers and other silver-loving, silver ions will be deposited in the axon, and then the silver ions will be reduced by a reducing agent to the black metallic silver and shown. This method is often used to study the pathological changes of nerve cell protofibers in the brain of Alzheimer's disease and non-dementia patients of advanced age, and to identify neurofibromas and nerve sheath tumors. In addition, it has been useful in microsurgery in the study of splice growth of nerve fibers in experimental animals.