Nerves
The nerve is a fiber of nerve cells, which transmits nerve signals in the form of electric circuits. These fibers are found in two types. The first is the internal sensory fibers that are present in the skin and sensory organs, such as the eye, nose, ear, etc., The second type is a motor fiber that transmits nerve signals from the brain and spinal cord to the muscles and glands. In most cases, the nerves are composed of these two types, which are known as mixed nerves.
nervous cells
The neuron is characterized by its ability to receive the external influences that affect them, as they respond to these effects, and transfer to the nervous system in the form of nerve cells, and characterized by small nerve cell, due to the nature of composition, which is formed from a small corner, surrounded by liquid cytoplasm, which contains On the NESL granules, and other non-existent cells, as well as containing mitochondria, and Golgi apparatus.
The neuron is characterized by its ability to respond to external stimuli, without taking orders from the brain, as a programmed reaction within it, in order to protect the body from external influences, such as the reaction of sensory cells to exposure to extreme heat, or affected by different sources of pain.
Nerve damage
Is the disruption of the function of the nerve, by the inability of the neurons that make up to function, as a result of the illness that affects them.
Neuropathy
Is the disorder that afflicts the nerves, disrupts its function or reduces its efficiency, as it can not respond to reflex response, and often affect the surrounding nerves, which is accompanied by pain in the hands and feet, and feeling of tingling.
Causes of Neuropathy
- Diabetes is one of the most common causes of this disease, especially peripheral neuropathy.
- Infectious diseases, especially sexual, such as AIDS and syphilis.
- Treatments for cancer.
- Food or drug poisoning or other causes, such as poisonous snake bites.
- Genetic diseases affecting the nerves.
- Indirectly linked causes, such as vitamin deficiencies, and some diseases such as rivets, basin … etc.
Effects of neuropathy
- Effect on movement in case of motor neuron injury.
- Influence on the sensation of external influences, such as pain, heat and cold.
- Influence on cardiovascular function and intestines, in cases of involuntary neuropathy.