The center nervous system is constructed by two types of tissue:
The grey matter is made up from neuronal cells and axons that are called unmyelinated because they are not covered with the fatty protein called myelin. The function of Axons is to carry signals between neuronal cell bodies.
Grey matter has one great purpose in our brains and that is to process information. It [The Grey matter] process signals that are generate from the sensory cells in the muscles, skin and other areas from the body. This includes heat, pain, touch etc. After the processing of the signal the tissue signals the nerve cells in the central nervous system to induce a response to the stimuli. The signals generated by this complex system reach the grey matter through the white matter that is made up from myelinated axons which is why the white matter is white. (The myelin has a white-ish color). This tissue is mainly concentrated in the cerebrum and the spine.
Other parts of the grey matter include the glial cells and capillaries. Capillaries bring blood the grey matter, while the glial cells transport nutrients and effect the neurons communications. This is the reason why the tissue has this greyish color and it is named Grey Matter.
The main function of the white matter is to transport signals to the grey matter. Because of its function the white matter is composed of long-range axons that are coated with myelin. The function of myelin is to protect and insulate the axons which transport neuronal signals. Because of the whitish color of the myelin the tissue is white in color.
White matter is found in the inner layer of the brain’s cortex, in contrast of the grey matter which is located on the surface of the brain. The spinal cord is arranged totally differently with the white matter on the surface and the grey matter inside. Some of the grey matter found deep inside the basal ganglia, thalamus and hypothalamus, while the white matter can be found in the optic nerves.
In the humans and other vertebrates the most complex brain functions occur in the cerebrum. The smaller vertebrate have smooth brains, while the large vertebrate have convoluted brains. The grey matter in the largest animals like blue whales and elephants is highly convoluted. Inside the “shell” of grey matter is the white matter made from myelinated nerve fibers.
In the following list you can find out where exactly the grey matter is located:
- Surface of the brain’s cortex.
- Surface of cerebellar cortex.
- Deep in the spine, hypothalamus, thalamus, structures of the basal ganglia.
- Spinal horns: Anterior, Lateral and Posterior Horn.
- In the nucleus of the brainstem, olivary and substantia nigra.
- Cranial nerves.
More from Physical Health
Every parent nowadays is dependent on baby wipes as the most exploited tool for maintaining their child’s hygiene. They seem to …