How nerves function

A nerve is made up of strings of nerve cells, or neurons, which are the basic units of the nervous system. Some nerves carry instructions from the brain or spinal cord to muscles, glands, or other tissues throughout the body Others carry information to the brain from sensory receptors, sensory organs such as the eyes and ears, and internal organs. Each nerve cell (see right) has parts that receive electrical messages from other nerve cells, and parts that transmit messages to nerve cells or other tissues. The cell bodies of neurons make up the gray matter of the brain and spinal cord, while the long nerve fibers, or axons, make up the white matter of the central nervous system.

All but the smallest nerve fibers are insulated and protected by a fatty substance called myelin, which also helps to conduct nerve impulses quickly along the fibers. Multiple sclerosis is believed to occur because the myelin becomes damaged in some way. The brain and spinal column are protected by delicate membranes called meninges.

network of nerves Nerves extend to all parts of the body in a vast and complex network. The peripheral nervous system spreads out from 12 pairs of cranial nerves, which are connected to the brain, and 31 pairs of spinal nerves, which are connected to the spinal column. Peripheral nerves branch and divide so that all organs, tissues, and farthest reaches of the limbs are contacted.

Digital Veins Fingers

Nerve fiber is surrounded by protective myelin sheath structure of a nerve cell A nerve cell, or neuron, has a cell body, and a long nerve fiber, or axon. Dendrites receive nerve impulses from other nerve cells. Impulses are carried away from the cell body by the nerve fibers, and can travel at speeds of up to 300 miles (500 km) an hour.

Nerve fiber is surrounded by protective myelin sheath structure of a nerve cell A nerve cell, or neuron, has a cell body, and a long nerve fiber, or axon. Dendrites receive nerve impulses from other nerve cells. Impulses are carried away from the cell body by the nerve fibers, and can travel at speeds of up to 300 miles (500 km) an hour.

Peripheral Neuropathy Natural Treatment Options

Peripheral Neuropathy Natural Treatment Options

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